I will pick best answer if you can make me laugh...

[i-no-mo-den-u]

yo mommas so hairy when she gave birth to you it gave you a rug burn!

[elwolvesorulez]

ive got 2: yo mamas so fat, when she goes to the beach whale come up to her and sing "we are family ,even though you're bigger than me." the second 1 is yo mamas so old that ashton kutcher would date her.

[Bodies]

Yo mama's so fat that when she's asked to set the table, she puts the plates on her chest.

[just 2 try]

Yo mamma so fat, every time she turns around its her b-day!!!

[messyaheadup]

Yo Mamma is so fat that when she walks backwards she BEEPS!

[Fireglo72]

Yo Momma is so fat, if you threw a tennis ball at her, it would go into orbit around her!

[CaptCrawfish]

Yo mammy's so fat...every time she calls out for Chinese, another zero is erased from the trade deficit.

[garethjamesf1]

yo momma so old she fart dust, and her s**t is carbonised. .......Hey maaaaan dat's good s**t, roll me another.

[Bossplayer]

Yo mamma wears a hair net....on her BACK!!

[ibwangingguts00]

yo mama so short when she sits on the curb he feet dangle