Top Definition
To describe a move or activity that isn't worth it.
Guy 1: Hey bruh you tryna go to Bowie this weekend to go see this girl?
Guy 2: Bowie far as hell naw! That's a whole dead mission.

Guy 1: I'm gonna go and try to get that lightskin girls number over there wish me luck.
Guy 2: She sitting with a group of dudes bruh you know that's a dead mission.
by Clutch_Oven June 03, 2016
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