a girl thats looks like a man or has manly features... Stands for SOME MAN CHEEKS
(Kyle says) Yo look at this 38 yr old woman i just scored and i'm only 20. I'm the Hot Shit!!! (jason replies) Uh.... no man..... she was a straight up dude !!!! She looked like she had SUMANCHEEKS !!!!!!! How could you miss that ?? !!!!