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1.
Referring to the action or act of blatantly slapping another person across the face with your erect penis.

An onomatopoeia referring to a cockslap.
"While she was giving me head he gagged, so I grabbed her face and slapped it with my dick like WA-PAP!"

"Dude, I just wa-pap'ed this girl for bein' a bitch"
by Combar September 05, 2011