1. When a person has been penetrated by two males.
2. A term used, normally used in first person shooters, when 2 players on the same team dominate the game.
1. My buddy and I just twin cocked that girl.
2. My buddy and I just twin cocked your entire team!
by lilhoss2130 January 21, 2010
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two people most commonly male with identical cocks
when peeing in a public restrooms and you look at the guy next to you and say hey we are cock twins
by Bean's March 30, 2011
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