nms saf: natomas middle slap ass friday the day when all the boys AND girls of natomas middle school slap each others asses(usually kind of hard) every friday. its usually popular amongst the 6th and 8th graders not so much the loners of the school the, 7th graders. Its also a day for you to slap your crushes ass witout being called a wierdo or another hurtful name
dude 1: dude i can't wait for the annual nms saf
dude 2: i know right its my chance to slaps lillie's ass without getting told on or being called a wierdo.