the act of forcefully shoving & fitting you and your friends penises in someones vagina/anus with a group of 5 or more people. In short, it's called T.I
John: Dude, why is that girl sitting on a bag of Ice?
Mike: Because a bunch of guys performed Team Insertion on her last night.
John: Jesus! How many people?
Mike: About 17. She was going for a world record.
by toomuchshame August 3, 2009
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