1 definition by Houndawg
This voice-communication alternative to "where are you?" derives from the police 10-codes, no longer used in most jurisdictions but nearly-standard in the U.S. from the 1940's until federal agencies discouraged them in the 21st century. "10-20" meant "What's your location?" or "My location is..." depending on the context. Ten-codes peaked in public awareness in the 1970's when the hit song "Convoy" brought citizens-band use of "10-4" to a period of widespread recognition.
The raw rookie cop had noticed that most police on duty substituted a different phrase rather than using the ten-codes he'd been taught in the Academy. He transmitted "where's your 20?" to his partner because he'd forgotten other cops usually said "what's your 20?". His veteran partner responded, "In my wallet with my five and two ones".
by Houndawg January 21, 2012