look up any word, like dirty sanchez:
 
1.
-when a girls pussy gets fucked so hard, that its on the verge of actually "whacking" her.

-Where the guy slaps his dick on the girls mouth.
Girl"mmm yeah harder"
Boy "like that puss whacked"

Guy "can I puss whack you"
Girl "yeah baby mmm right on my mouth"
by slopysecondsbabe February 08, 2014