1.'Men in black' as in the movie, shooting aliens up and stuff.
2.Manchester united FC away supporters/fans/hooligans are often to referred as the red army, MIB or 'men in black' due to there dress code which is predominantly black.
1.Kay: Set for pulsar level five, subsonic implosion factor two.
Kay: Just shoot the damn thing on the count of three.
2.rival supporter:Get our fackin boys together, the MIB are coming to town tonight.