Yo' Mama's hair is so full of dandruff, when she shook her head, the principal called a snow day.
Yo' Mama is so skanky, she was asked to leave the OTB.
Yo' Mama is so dumb, she got fired from a blow job.
Yo' Mama is like a telephone book: available to the public, no charge.
I could have been your daddy, but the line was too long.
Yo' Mama is so fat, when she rubs her legs together, I smell bacon.
Yo' Mama is so stanky, even the garbage man won't pick her up.
Yo' Mama is so stupid, she gave your kids a "Yo' Grandmama Is So Stupid" joke book.
Yo' Mama is so poor, she considers the give-a-penny/take-a-penny cups part of her own "Save Yo' Mama" foundation.
Yo' Mama is so ugly, she has to sneak up to water fountains to get a drink.