the act of smacking a vagina in order to inflict painful pleasure. The accepted technique is useful when a girl is on her period, since muff slapping does not involve penetration. Advanced slappers indulge in a pre-slap lick of the fingertips (in order to "get it wet"). Most commonly used on crack whores or slutty broads.
Ryan: Yo, did you fuck that bitch last night?
Evan: Nah she had her period so i got it wet then muff slapped the shit outta her.
(noun): a woman whose snatch dates back to the prehistoric age. In fact, most historians suggest that with the proper inspection primative drawings can be found on a muffosaur. Duely noted, the clitoris is usually petrified. Therefore, it would be nearly impossible to "get it wet".
Otter: How was your smash session last night?
Evan: Not a smash session, more like an archaelogical dig, that bitch was a muffosaur!