Yo mama

Yo momma so ugly they refuse to let her into the mirror store.

I would make a yo mama joke, but they've been done a thousand times. Like your mum.

the boomerang one would have been funnier if he said it went into orbit.

Cartman had the best mama jokes though... "My momma's so poor she waves around a popsicle and calls it air conditioning....."
"Dude, my momma's so poor when she gets mad she can't afford to fly off the handle so she's gotta go Greyhound off the handle!"

Always hated yo mama so fat -jokes, don't know why tho

Yo momma soooooo fat, just the thought of her broke my neck.
Yo momma sooooo fat. When she cut her finger gravy poured out.
Yo momma soooo ugly. I tied a porkchop around her neck to get the dog to play with her but the dog bit me for wasting food.

Yo mama's so ugly, when she plays Mortal Kombat Scorpion says "Stay over there!"

Yo mama so fat when she presses up on an elevator it goes does