Making Everyone Dumber

What you just said is one of the most insanely idiotic things I've ever heard. At no point were you even close to anything that could be considered a rational thought. Everyone in this room is now dumber for having listened to it.

Yo Mama - Instructions

Yo mama so stupid, she has to re-read the instructions on the shampoo bottle every time she showers.

Last Ditch Effort

Two football players were taking an important final exam. If they failed, they would be on academic probation and not allowed to play in the Sugar Bowl the following week. The exam was fill-in-the-blank. The last question read, "Old MacDonald had a _________." Bubba was stumped. He had no idea of the answer. He knew he needed to get this one right to be sure he passed. Making sure the professor wasn't watching, he tapped Tiny on the shoulder. "Pssst. Tiny. What's the answer to the last question?" Tiny laughed. He looked around to make sure the professor hadn't noticed then he turned to Bubba. "Bubba, you're so stupid. Everyone knows Old MacDonald had a farm." "Oh yeah," said Bubba. "I remember now." He picked up his No. 2 pencil and started to write the answer in the blank. He stopped. Reaching to tap Tiny's shoulder again, he whispered, "Tiny, how do you spell farm?" "You are really dumb, Bubba. That's so easy. Farm is spelled E-I-E-I-O."