Yo mama’s so fat, the genie gave her six wishes.
Yo mama’s so ugly, she summoned an incubus and it committed suicide.
Yo Mamma so fat, when she moons someone, she causes tides.
So ugly, Star Trek used her as an alien without any makeup.
You Mamma so fat, she holds her pants up with an asteroid belt.
Yo mamma so fat, Yoda judges her by size.
Yo Momma’s so fat, she had her picture taken last Christmas and it’s still printing.
Yo Momma’s so fat that when she fell, no one laughed but the ground cracked up.
Yo Momma’s so fat, her belly button gets home 15 minutes before the rest of her does.
Winner.
To a Klingon: “Your mother does not wear combat boots.”
You’re mother is so unattractive, even Captain Kirk would not engage in coitus with her.
Jabba perhaps?
Yo mamma so stupid, she flunked out of Pakled school.
Yes, Jabba the Housing Development.
Yo mamma uses a Kuiper belt.
Yo mama so stupid, she denser than a neutron star.
Yo Mamma too fat to be a singularity.
Yo Mama so ugly Medusans won’t look at her.
Yo mamma so fat, she has to let out a notch on the Van Allen belt
Yo mamma so fat, it takes two Borg cubes to assimilate her
Yo mama so nasty, the residents of Talos IV forbid contact with her.
Yo mamma’s so fat, she’s on the Hertzsprung–Russell diagram.
Yo mamma’s so dense, she can be found by neutrino detection stations.
Yo mamma’s so fat, she makes tide calculations a three-body problem.
Yo mamma’s so fat, when she goes for a jog, birds do gravitational slingshots off her.
Yo mamma’s so dense, sound propagation in her skull nearly violates the light speed barrier.
Yo momma so fat, when she died she put soylent green out of business.
Yo momma so stupid she thought The Omega Man was a frat house.
Yo momma so fat it takes six transporters to beam her up.
The Millenium Falcon did the Kessel Run in 5 Yo Mommas.