Worth Trying

A very well-built young lady was lying on her psychiatrist's couch, telling him how frustrated she was. "I tried to be an actress and failed," she complained. "I tried to be a secretary and failed; I tried being a writer and failed; then I tried being a sales clerk and I failed at that, too."
The shrink thought for a moment and said, "Everyone needs to live a full, satisfying life. Why don't you try nursing?"
The girl thinks about this, then bares one of her large, beautiful breasts, points it at the shrink, and says, "Well go ahead, I'll give it a try!"

Yo Mama - Trash Bags

Yo mama so fat she wears trash bags for socks.

Yo Momma - Cars

Yo mama's so fat, when she crosses the street, cars look out for her.