Joke: Yo mama's so fat and old, that when she tripped she crushed the dinosaurs and killed them.

Joke: Yo mama so stupid, when I told her that she lost her mind, she went looking for it.

Joke: Yo mama so stupid that she brought a ruler to bed to see how long she could sleep.

Joke: Yo Mamas so stupid she was yelling into the mailbox. We asked her whats she doing and she said, she was sending a voice-mail.

Joke: Yo mamma so fat when God took a picture of her at the birth of the world it's not even half way done printing.

Joke: Why does a skeleton not like to go swimming?