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When a females panties, and/ or buttcrack show after sitting down in a low chair.
Jada had a pantie slip at school today and I got hard as hell.
by Marcus peterson July 08, 2012
During or prior to intercourse when a man takes off a hot woman's panties.
Carly: Man, that sex we had last night was great. Josh even pantie slipped me!
by command9898 November 19, 2007