Your mama is so ugly she jumps and the gravity did not return.
Yo' Mama is so stupid, she poured a bowl of Cheerios and said, "Look, my alphabet soup spells 'Ooooo.'"
Yo mama is so fat, it says to be continued, when she gets on a weighing-machine.
Yo Momma has so many chins, it looks like she's wearing a fat necklace!
Yo momma so fat that when she went to her prom she literally raised the roof.
Yo momma is so ugly that Superman lost his supervision and went blind.
Yo mama so fat when she looks in the mirror the mirror said: "oh no get out the way."
Yo mama so ugly Lady Liberty blew her torch out so she wouldn't have to see her.
Yo mamma so fat when she looked at the scale she yelled, "Thats not my weight, thats my phone number!"
Yo' Mama is so stupid, she thought the international dateline was a global dating service.