MUNDANE MYSTERIES: Why Truckers Say “10-4”

MUNDANE MYSTERIES: Why Truckers Say “10-4”

Some truck driver slang just makes sense. Like “Bambi”, which means a deer is in the vicinity. “Go-go Juice” means diesel fuel. “Seat covers” are actually pants. But what about the phrase “10-4”. You may know that 10-4 basically means “okay” or “I got your message”, but why? Where did that come from? 10-4 came…