Yo momma is so old she squirts out powdered milk.
OOOOOOOOOOOOOHHHH!!!!!!!!!!!

YO MAMA SO FAT SHE SAT ON A RAINBOW AND MADE SKITTLES

Person 1: How do you like your eggs?
Person 2: on yer ma.

Yo momma so fat she appeals to my secret fetish.

@Dr. Awkward That's not even the best one from SMBC. Let me find it...

Here we go:

http://www.smbc-comics.com/index.php?db=comics&id=1458#comic