Trucker Slang for Driving Speed: CB Terms Decoded
From hammer down to back it down, truckers have a rich vocabulary for talking about speed on CB channel 19. This guide decodes every speed-related CB phrase, explains how to use them correctly, and provides real-world examples so you sound like a veteran on the radio.
Ahmad Qazi
Founder & CEO, O Trucking LLC
Fact-Checked by O Trucking Editorial Team
Sources:
Written by Ahmad Qazi, founder of O Trucking LLC, drawing on 9+ years dispatching for owner-operators. Learn more about us.
O TruckingTrucker Slang for Driving Speed: CB Terms Decoded (2026)
Key Takeaways
- “Hammer down” means full speed; “back it down” means slow down — they are direct opposites on channel 19.
- “Georgia overdrive” (coasting in neutral downhill) is illegal and dangerous because you lose engine-braking control.
- “Running heavy” can mean either hauling a loaded trailer near 80,000 lbs or driving fast — context decides.
- Never state your exact speed on the CB; use slang instead, as a specific number can be self-incriminating.
- Most company trucks are governed (speed-limited) at roughly 62-68 mph, so “on the governor” explains why a truck cannot go faster.
Speed-Up Terms: Going Fast on the CB
These CB phrases all communicate that someone is driving fast, accelerating, or encouraging others to pick up speed:
| CB Term | Meaning | Example Usage |
|---|---|---|
| Hammer down | Drive at full speed / accelerate | “Clear road ahead, hammer down” |
| Pedal to the metal | Accelerator fully pressed | “Had it pedal to the metal up that grade” |
| Running like the wind | Moving fast without obstruction | “Westbound is running like the wind tonight” |
| Got it on / Got it going | Driving at highway speed | “Yeah, got it on and heading for Dallas” |
| Pushing it | Driving fast, possibly over the limit | “That flatbed is really pushing it” |
| Letting the hammer hang | Cruising at top governed speed | “Just letting the hammer hang through Kansas” |
Slow-Down Terms: Reducing Speed
These terms warn other drivers to slow down or describe reduced speed situations:
| CB Term | Meaning | Example Usage |
|---|---|---|
| Back it down | Slow down / reduce speed | “Back it down, driver — bear at the 142” |
| Bringing it back | Slowing down, reducing speed | “Bringing it back for this construction zone” |
| Backing off | Reducing speed gradually | “Backing off, roads are getting slick” |
| Feeding the bears | Getting a speeding ticket | “Don't end up feeding the bears tonight” |
Context Is Everything on the CB
Colorful Speed Phrases and Their Origins
Some of the most unique trucking slang relates to speed. Here are the stories behind the terms:
Georgia Overdrive
Coasting downhill in neutral. Named for Georgia's mountainous north where some old-school drivers would shift to neutral on downgrades. This is extremely dangerous and illegal — you lose engine braking and the ability to control speed on grades. The term is now used as a cautionary joke among experienced drivers.
Hammer Lane
The left lane / passing lane. Where you drive when you have the hammer down. The right lane is the “granny lane.”
Governed / On the Governor
Running at maximum electronic speed limiter. Many company trucks are governed at 62-68 mph. “I'm governed at 65” explains to other drivers why you cannot go faster.
Rolling / Rolling On
Simply means driving / in motion. “Just rolling on through Tennessee” is a casual status update indicating the driver is moving along at normal speed without any issues.
How to Communicate Speed on the CB
Using speed slang correctly on the CB involves understanding context and etiquette. Here are some guidelines:
- Never state specific speeds on the air: Saying “I'm doing 78” is bad form and potentially incriminating. Use slang instead: “Got the hammer down” or “running with traffic.”
- Use speed terms as warnings: “Back it down at the 205” is more useful than “slow down.” The CB-specific phrasing grabs attention faster.
- Acknowledge speed warnings: A quick “10-4, appreciate it” lets the reporting driver know their message was received.
- Do not brag about speed: Experienced truckers do not boast about how fast they are going. It is unprofessional and can attract unwanted attention from bears monitoring channel 19.
Speed Slang for New Drivers
Speed Slang and Safety
While speed slang adds color to CB communication, the underlying message is always about safety. The entire bear-reporting system exists to help drivers maintain safe, legal speeds. Speed-related CB communication serves several critical functions:
Speed trap awareness: Bear reports and “back it down” warnings help drivers avoid costly CDL speeding tickets that can derail a career.
Weather and hazard updates: “Back it down for ice” or “bringing it back through fog” communicates critical safety information quickly to other drivers on the road.
Traffic flow communication: “Running like the wind” versus “parking lot ahead” tells approaching drivers what speed to expect, allowing better trip planning and fuel management.
Understanding speed slang is not just about fitting in on the CB — it is a practical safety skill that helps you drive smarter, stay legal, and avoid expensive mistakes on the road.
Speed Slang FAQ
Common questions about trucker CB slang for driving speed
What does 'hammer down' mean in trucker slang?
Hammer down means to drive at full speed or to accelerate. The phrase refers to pressing the accelerator pedal all the way to the floor — like hammering it down. On CB radio, when someone says 'hammer down,' they mean go as fast as you can or that they are driving at top speed. It is one of the most recognized trucker CB terms. Example: 'Got a clear road ahead, hammer down.' The opposite is 'back it down,' meaning to slow down.
What is 'Georgia overdrive' in trucking?
Georgia overdrive is trucker slang for coasting downhill in neutral. The term comes from the hilly terrain of Georgia where some drivers used to put their transmission in neutral on steep downgrades to save fuel and pick up speed. This practice is extremely dangerous and illegal in most states because you lose engine braking control. Modern truckers use the term humorously but know never to actually coast in neutral, especially with a loaded trailer.
What does 'back it down' mean on CB radio?
Back it down is a CB radio phrase meaning slow down. It is commonly used as a warning when there is a speed trap, bad weather, construction, or any other reason to reduce speed. Example: 'Back it down, driver — bear trap at the 205.' It is the opposite of 'hammer down.' When you hear 'back it down' on channel 19, pay attention because it usually means there is an immediate reason to slow down ahead of you.
What does 'running heavy' mean in trucker slang?
Running heavy has two meanings in trucker slang. First, it literally means driving with a heavy or fully loaded trailer close to the 80,000-pound gross weight limit. Second, it is used figuratively on CB radio to mean driving fast or aggressively — running with a heavy foot on the accelerator. Context determines which meaning is intended. If someone says 'running heavy on I-40,' they likely mean they are hauling a heavy load. If they say 'that four-wheeler is running heavy,' they mean the car is speeding.
Is 'pedal to the metal' the same as 'hammer down'?
They are very close in meaning and often used interchangeably. Both describe pressing the accelerator hard to drive at full speed. 'Hammer down' is the more common CB-specific term and can also mean simply 'go ahead and roll' or 'I'm at top speed.' 'Pedal to the metal' is older general American slang for flooring the accelerator that truckers adopted on the radio. In practice, if you hear either phrase on channel 19, the driver means they are moving at their maximum speed.
What does 'on the governor' or 'governed' mean?
Being 'on the governor' or 'governed' means a truck is running at its maximum electronically limited speed. Most fleet and company trucks have a speed limiter (governor) set somewhere around 62-68 mph to save fuel and improve safety. When a driver says 'I'm governed at 65,' they are explaining to other drivers why they cannot speed up to pass — the engine simply will not allow it. Owner-operators sometimes run un-governed, which is why an independent truck may pass a company truck on a grade.
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