Been a while since Ive used Yo Momma jokes... I think the last time was in Elementary school... but I'll whip out a couple that I remember from back in the day... probably been posted already but oh well...
- Yo Momma so old, she farts dust and squirts powdered milk
- Yo Momma is so fat, she jumped up and got stuck
- Yo Momma is so fat when god said, "Let there be light," she moved her fat ass
- Yo Momma is so fat I had to slap her thigh and ride the wave in
- Yo Momma is so fat her blood type is gravy
- Yo Momma so skinny she swallowed a marble and looked 9 months pregnant
- Yo Momma so poor, I saw her walking down the street kicking a can. I said, "Watcha doin'?" and she said, "Movin'."
- Yo Momma's like railroad tracks... Gets laid all over the country
I knew a lot more, but havent been in a situation lately where I need to use them so cant think of more right now...

Enjoy!