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To have sex in your car, get some cut in your ride, to hump in yo whip.

This term is said a lot in old school hip hip particularly in New York by artists or groups such as: LL Cool J, A Tribe Called Quest, and Black Moon
Man, I'm tryna pick up girl and swing an ep.

Nigga I swung an ep last nite, word life.
by T-Realla from Sacramento May 08, 2009