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1 definition by The Three Johns

 
1.
360 Your Grandma (Can be changed to any other member of family, or animal).

Stating that the person speaking has had sex with the persons (insert family member or animal here) they are talking to.
Guy 1: 360 US!
Guy 2: 360 UM!
Guy 1: 360 UG!
Guy 2: You sick bastard! My Granmother is dead
by The Three Johns November 20, 2011