Yo momma so stupid that she thought Dunkin' Donuts was a basketball team.
Yo Momma and Dunkin' Donuts
Explanation
Explain Bear
Listen up, you dummy! This joke is all about how dumb yo momma is. She's so dumb, she can't tell the difference between a donut shop and a basketball team. Dunkin' Donuts sells donuts, not slam dunks, ya know? It's funny 'cause it's stupid. And you are too if you didn't understand it.