Like I said in the title, never say "yo mamma" to anyone who's never heard it. Me and 3 people around me (Three girls) were saying random "yo mamma" things. I said "yo mamma's so dumb, she climbed over a glass wall to see what was on the other side" one one of the girls, we'll call her Jen, and she thought she was dumb because you can't climb a wall (wow someone's intelligent). Anout 5 minutes later, another girl, we'll call her Joanne, OUT OF NOWHERE says "yo stupid!!!" I say "!?!?!??!?!?!?" And so she says she got it from Jen. Ths is all true, happened in art class, and the names aren't real. Thanks for listening!:) Sorry if you didn't find funny... :( (By the way, we are all Canadian!!! Just another demonstration of Canadian Smartness! I AM SO SMART, I AM SO SMART! S-M-R-T! I MEAN S-M-A-R-T!