Trucker Slang 101: Decoding Common CB Radio Phrases

For decades, the citizens band (CB) radio has been more than just a communication tool for truck drivers—it’s been part of a culture that connects men and women who spend long hours on the road. Over time, truckers have developed their own colorful language, filled with phrases that are practical, witty, and uniquely their own. Whether warning about road hazards or simply sharing a laugh, trucker slang helps keep America’s highways a little safer—and a lot friendlier.

Here are some of the most common phrases you’ll hear rolling across the airwaves:

“10-4”

One of the best-known CB phrases, it simply means: Message received or I understand.

“A smokey”

A playful nod to state troopers, named after the Smokey Bear–style hats many of them wear.

“Got a bear in the bushes.”

A warning about an undercover officer or hidden speed trap—helpful for anyone keeping an eye on their speed.

“Back door” and “front door”

Used to describe something behind (back door) or ahead (front door) of the driver.

“Hammer down”

Truck talk for hitting the accelerator and making up some time.

“Dragon wagon”

Not as fearsome as it sounds—it’s simply another name for a tow truck.

“Alligator”

Slang for a chunk of shredded tire lying in the road. These “alligators” can be dangerous if hit at high speeds.

“Double nickel”

A throwback to the days when the U.S. national speed limit was set at 55 mph.

“What’s your 20?”

Short for What’s your location? This one’s so common it’s entered into everyday speech.

“Brake check”

A heads-up that traffic is slowing down or stopped ahead.

Beyond these classic terms, CB radio lingo continues to evolve, reflecting the creativity and camaraderie of life on the road. Truckers use this language not just to share warnings about hazards or law enforcement, but also to build community during long hours of solitude behind the wheel.

Truck driver slang is a reminder of how this essential workforce has developed its own culture—one built on respect, resourcefulness, and resilience. The next time you pass an eighteen-wheeler on the highway, you might think about the voices on the other end of the radio, swapping stories, looking out for one another, and keeping America moving mile after mile.