Trucker Speed Slang: Complete Glossary
From hammer down to back it down, granny lane to Georgia overdrive — this is every speed-related CB slang term truckers use on the highway. Learn what they mean, how they are used, and the real-world context behind each term.
Ahmad Qazi
Founder & CEO, O Trucking LLC
Fact-Checked by O Trucking Dispatch Team
5+ years dispatching drivers with daily CB radio communication
Sources:
Written by Ahmad Qazi, founder of O Trucking LLC, drawing on 9+ years dispatching for owner-operators. Learn more about us.
O TruckingTrucker Speed Slang: Complete Glossary (2026)
Key Takeaways
- “Hammer down,” “pedal to the metal,” “pour on the coal,” and “let it eat” all mean accelerate or run at full speed.
- “Back it down” and “back off the hammer” mean slow down — usually because of police, weather, traffic, or a work zone ahead.
- The hammer lane is the left/passing lane; the granny lane is the right/slow lane where governed and fuel-conscious trucks ride.
- “Governed” means a truck is electronically speed-limited by the carrier, commonly between 62 and 68 mph.
- “Double nickel” is 55 mph, a holdover from the 1974 national speed limit; “Georgia overdrive” (coasting in neutral) is dangerous and illegal in many states.
Speed & Acceleration Terms
| CB Term | Meaning | Example |
|---|---|---|
| Hammer down | Drive at full speed | “I got the hammer down” |
| Put the hammer down | Accelerate, go faster | “Put the hammer down and let's roll” |
| Pedal to the metal | Full throttle | “Pedal to the metal on I-10” |
| Back it down | Slow down, reduce speed | “Back it down, bear ahead” |
| Back off the hammer | Ease up on the throttle | “Better back off the hammer” |
| Running hot | Speeding above the limit | “He's running hot in the hammer lane” |
| Rolling | Moving, driving (any speed) | “We're rolling eastbound” |
| Governed | Speed limited by governor | “I'm governed at 65” |
| Georgia overdrive | Coasting in neutral (dangerous) | Not recommended — illegal in some states |
| Double nickel | 55 mph (from the old national limit) | “Keep it at the double nickel through the work zone” |
| Pour on the coal | Accelerate hard (steam-train origin) | “Pour on the coal — green light up ahead” |
| Stand on it | Floor the throttle, full power | “Stand on it up this grade” |
| Let it eat | Open it up, run at full speed | “Clear ahead — let it eat” |
| Walking the dog | Cruising fast, out front of the pack | “He's walking the dog up the hammer lane” |
Lane & Position Terms
| CB Term | Meaning |
|---|---|
| Hammer lane | Left lane (fast/passing lane) |
| Granny lane | Right lane (slow/driving lane) |
| Travel lane | Center lane (3-lane highway) |
| Big road | Interstate highway |
| Slab | Highway pavement, the road itself |
| Bumper sticker | Vehicle tailgating you |
| Rocking chair | Middle truck in a convoy |
| Front door | Lead truck / ahead of you |
| Back door | Last truck / behind you |
Speed Slang in Context: Real CB Exchanges
Speed terms rarely show up alone on the CB — they get strung together with location, direction, and enforcement callouts. Here is how the lingo actually sounds on the highway:
“Westbound, you got a bear in the grass at the 88 — better back it down out of the hammer lane.”
Translation: a police officer is hidden near mile marker 88; slow down and move out of the left lane.
“I'm governed at 65, so y'all can pour on the coal and go around — I'll hold the granny lane.”
Translation: this truck is speed-limited to 65 mph; faster traffic should pass on the left.
“Clear and green all the way to the scales — let it eat, but mind the double nickel through that work zone.”
Translation: no traffic or police ahead, so run at speed, but drop to 55 mph in the construction zone.
Slang Is Not a License to Speed
Hammer Down Responsibly
The Granny Lane Is the Money Lane
Speed Slang FAQ
Common questions about trucker speed CB slang
What does 'hammer down' mean in trucking?
Hammer down means to accelerate, drive fast, or go at full speed. The term comes from pressing the accelerator pedal (the 'hammer') to the floor ('down'). It is one of the most iconic pieces of trucker CB slang, popularized by the 1975 song 'Convoy' and the 1977 movie 'Smokey and the Bandit.'
What is the 'hammer lane' vs the 'granny lane'?
The hammer lane is the left lane (fast/passing lane) on a highway — where you drive when you have the hammer down. The granny lane is the right lane (slow/driving lane) where slower traffic travels. On three-lane highways, the center lane is sometimes called the travel lane. Many states restrict trucks from using the hammer lane.
What does 'back it down' mean?
'Back it down' means slow down or reduce speed. It is the opposite of hammer down. Truckers use this phrase to warn other drivers to slow down, usually because of a bear (police) ahead, construction zone, weather, or traffic. Example: 'You better back it down, driver — full-grown bear at the 142.'
What does 'governed' mean in trucking?
'Governed' means a truck has a speed governor (electronic speed limiter) set by the carrier. When a trucker says 'I'm governed at 65,' they mean their truck's computer will not allow the engine to push the vehicle past 65 mph regardless of throttle input. Most large carriers govern their trucks between 62-68 mph for fuel savings and safety.
What is a 'double nickel' in trucker slang?
'Double nickel' means 55 mph. A nickel is 5, so double nickel is 55. The term dates to the National Maximum Speed Limit era (1974 onward) when 55 mph was the federal cap, and it stuck around because 55 mph is still a common limit in work zones, on many secondary roads, and in states that post lower limits for trucks. You will also hear 'doing the double nickel' to mean holding a steady 55.
Is 'Georgia overdrive' illegal?
Georgia overdrive means shifting into neutral (or pushing the clutch in) to coast down a hill so the truck picks up free speed. It is dangerous and illegal in many states because coasting in neutral removes engine braking and reduces your control of the rig, especially on a downgrade. Most states have a specific statute prohibiting coasting in neutral with a commercial vehicle, and it is a common citation. Use your engine brake or Jake brake instead of coasting.
Why do truckers ride in the granny lane below the speed limit?
Many truckers cruise in the right (granny) lane at 62-65 mph even when the limit is higher because fuel burn climbs sharply with speed — every few mph faster costs measurable miles per gallon. Trucks are also frequently governed by their carrier, and some states restrict trucks from the left lane entirely. For an owner-operator paying for their own diesel, slowing down a few mph protects thousands of dollars in annual fuel costs.
Smart Dispatch for Smart Drivers
Our dispatchers plan realistic schedules so you never have to hammer down to meet a deadline. Safe speeds, saved fuel, protected CDL.