Yo mama's so stupid, she put on her glasses to watch 20/20.
Yo mama's so stupid, she climbed over a glass wall to see what was behind it.
Yo mama's so stupid, she asked me what yield meant. I said "Slow down" and she said "What...does.... yield... mean?"
Yo mama's so stupid, she stopped at a stop sign and waited for it to say go.
Yo mama's so stupid, she told me to meet her at the corner of "Walk" and "Don't Walk."
Yo mama's so stupid, when she took you to the airport and a sign said "Airport Left," she turned around and went home.
Yo mama's so stupid, she thought a lawsuit was something you wear to court.
Yo mama's so stupid, she tried to mail a letter with food stamps.