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3. 4-0
slang for a fourdypronunced four-o.
He the the store and get me a 4-0.
1. 4-0
Derogatory slang for mall security guards/vehicles. Derived from 5-0, a slang term for police officers/vehicles.
The 4-0 got on my ass after I boosted that Clay Aiken CD from Sam Goody.
by Sam Mar 4, 2004 add a video
2. 4-0
A civilian or any non-law enforcement person who will (try to) bust you.
You check for people in here, I'm not tryna get caught

Yeah, no 4-0, were good.
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