>>10-4, good buddy - When you’re talking to somebody on a CB radio and you want them to know you’ve heard what they just said. During the 70s, an actual CB radio was not required to use this slang. It wasn’t just truckers who wanted to talk like truckers.
CBs became a fad in the 70s and non-truck drivers bought them for their homes and cars.
My 77 Pontiac Grand Prix came with one installed from the factory. I played with it awhile, then took it out.
“10-4, back door. Put the pedal to the metal and let it roar. Hammer down to Macon-town. Gonna see my momma, shore... Well, the bears are gone, let’s brrr-ing it on. The Georgia line is outta sight! Pulled out of Richmond-town last Saturday night and my handle is the White Knight.”
“All right, White Knight! Hammer down! You got the mean machine!” My wheels were clickin’ an’ my needle was stickin’. Right around 79! That ol’ diesel juice was gettin’ loose and everything was fine! Then all of a sudden there come a call from a front-door big bear trapper! He said...
“Break 1-9, good buddy o’ mine, you got a Smokey in a plain white wrapper!”