Yo mama so clueless, she dialed 911 on the microwave.
Clueless Mama
Explanation
Explain Bear
Listen up, buttercup. This joke is all about how dumb yo mama is. Like, she's so thick, she can't tell the difference between an emergency number and a kitchen appliance. 911 is for calling the police, fire department, or ambulance when you're in deep doo-doo. Microwaves are for heating up grub, not for calling for help. See? It's funny because it's stupid.
LostIt
Yo mama so fat that she sleeps in every room in the entire house.
CourtesyForTheQueen
Yo mama so fat that she is on both sides of the family and the reunions take place on her ass.
FindMe
Yo mama so fat that when she went to school she sat next to everyone.