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Definitions by cguy20

Doing the big one 

1. Another name for Sexual intercourse
2. Intense sexual intercourse
3. Kinda like "doing the nasty" but different name
4. Fucking every day all the time
Steve has sex every day, so he's doing the big one

John's in another room, and you hear humping. He's doing the "big one".
Doing the big one by cguy20 April 17, 2010