2. The Act of Patting yours or someone elses vagina vigourisly or with serious intensity in order to achieve an orgasm.
3. A form of Female Masturbation
Generally used positively as a verb, and occasionally as a noun.
(v.): "Yo, I'm glad I studied, cuz I whapsed that exam."
(n.): "Did you get whaps from that girl you brought home last night?"
(n.): "Chill out and don't call her for a week -- she's got you caught up in the whaps."
The teacher for WHAP is so cool that he's the only reason that people take AP.