a 10-4 - A 10-4 is like saying, "I heard you, you loudmouth,"

A 10-4 is like saying, "I heard you, you loudmouth," usually when someone is talking over a loud radio or a loud truck.

"10-4, I heard you loud and clear," he said as he was listening to his truck radio.

She yelled, "10-4! I heard you over my hairdryer!"

He responded with, "10-4, I heard you over the screaming kids."