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.
The act of a jewish male, while rapping, he simultaneously takes his cock out, and after profusely rigging his mast, he lets it flyfree, straight into a more 'free spirited' females face, ejaculating on her cheeks as he slaps her.
Such an act is rarely occurs.
Bob: Did you see that cummy cock slap jew rap dick fap Steven gave Keri at the party? It was a HARDCORE throttle.
Dave: Yeah, her cheek looked like strawberry shortcake.
Happy slaps was first made from chavs 14 - 16 year old lads slapping an unsuspecting person at school or outside of school. Another accomplice records the slap on their phone which their dad got from the back of a black lorry. Usually, they are in groups because they are faggits who don't do it individually - victims can be women, blokes, anyone the pricks think are a suitable target.