HAHAA i found these on melike's livejournal:

"Yo mama's SO stupid, she thought absolute zero was a vodka!"
"Yeah, well yo momma's so stupid she thought a mol was the thing on the side of her fugly face."
"Yo momma's so stupid she thought a noble gas was what prince charles had after eatin beans."
"Yo mama's so stupid she thought the periodic table was about her menstrual cycle!"
"Yo mama's so fat even electrons can't pass through her!"
"Yo mama's so stupid she thought heavy water was what an overweight pregnant woman broke."
"Yo mama's so prude she thought string theory was just another pervy fashion craze."
"Yo mama's so rank she thought Boyle's law would help her understand her skin problems."
"Yo mama's so vain, dumb, fat, and mentally fucked up, that when the psychologist told her to examine her ego she rushed home to get the waffles out of the freezer."
"Yo mama's so dumb she thought photosynthesis is something the dudes behind the counter at CVS do when she gives them her rolls of film."