Yo' Mama is so stupid, you need to put your head up her ass to get her perspective.
YO MAMA IS SO STUPID SHE GOT FIRED FROM A BL*W JOB.
So this blonde woman walks into a shop and asks the owner "Have you got a phone I can borrow as I have a bit of money and I want to call my mom." The owner says "yes" and takes her to the back of the room as he realized she was a blonde so he wanted a blowjob. So they go in the back of the room and the guy took his pants off and took out his penis. So the woman gave him the money and she put her mouth on his penis and shouted: "HEY MOM ARE YOU IN THERE!"
Your mamma is so stupid she tripped over a cordless phone!
"Yo momma so stupid she steals free bread!"
Yo momma so stupid she bought a solar-powered flashlight!
Yo' Mama is so stupid, she's as useless as a screen door on a submarine.
Yo mommas so stupid when she licked a dog she said meow.
Yo' Mama is so stupid, when she was pulled over for drunk driving and asked to walk a line, she said, "Which one?"
Yo' Mama is so stupid, when her boss told her to take her ugly ass home, she came back 10 minutes later without her ass.