hehehe I think these are funny, so this is pretty much why I posted them(: If you have any more, please post a comment so I can add it(: Sorry if these are offensive, I’m doing them as a joke.
Yo mama so fat when she wears a yellow raincoat, people said “Taxi!”
Yo mama so fat people jog around her for exercise.
Yo Mama so fat she has to eat wheat thicks.
Yo Mama’s so old her birthday expired.
Yo Mama’s so old she farts dust.
Yo Mama’s so old she has an autographed book of the bible.
Yo Mama’s so ugly she makes a blind man cry.
Yo mama is so fat that even dora couldn’t explore her.
Yo momma so stupid she tripped over a wireless phone.
Yo momas so fat she wakes up in sections!
Your momma’s so fat she jumped up in the air and got stuck.
Yo mama is so stupid she got locked in a key shop.
Yo mama so stupid she got locked in a grocery store and starved to death.
Yo mama’s so fat she puts lipstick on with a paint roller.
Yo momma so stupid she got hit by a parked car.
yo mamma so ugly they ate her on fearfactor!
Yo mama’s so fat she plays pool with the planets.
Yo mama’s so stupid she sold the car for gas money.
yo momma so stupid she shut off the lamp she dosen’t have.
Yo mama so lazy she’s got a remote control just to operate her remote!
Yo mama so lazy that she came in last place in a recent snail marathon.
Yo mama so lazy that she came in last place in a recent snail marathon.
Ya. .. that’s about all I got 
wow…….. thats pretty funny. my favorite was the one about getting hit by the parked car!
hey heres one…
yo mommas so stupid she threw a rock at the ground and missed!!
hehe.