A fournine is someone that you believe could be a snitch, or possibly an informant. Not a cop, but might as well be. Historically people would holler "5-0h", as an alert when police were in the area.
Typically when a person thinks someone is sus they call out, "fournine!"
Hey, put it away, four-nine in the room.
Hey, put it away, four-nine in the room.
by Makem McMoist December 24, 2025
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