What is M-slap?
1.
The act of pwning somebody to such an extremity that only slapping them with your genitalia could possibly match the awesomeness of that pwnage.
Not to be confused with the interest group MSLAP (Mankind Supporting Lethal Attacks on Polar-life)
Billy M-Slapped Jane when he made a humorous comment about her bulimic sister.
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1. 
Someone who can turn any situation or statement (no matter how squeaky-clean) into something "dirty" or sexual. Beyond dirty-m.. 
1. 
The sexual act when both a penis and the testicals are inserted into the vagina
I tried the full assembly but I failed cause she was to..