Top Definition
When you say something about someone that shouldn't ever be said with them around, not knowing that they're listening nearby, only to respond to you with unexpected anger and fury.
Xbox Kid 1: Yo I heard Mike's Girlfriends armpits were hairy.

Xbox kid 2: Yeah man me too.

Mike: You guys crossed the line, next time I see you guys you're all fucking dead.
by roflwat12 August 31, 2010
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