This fat kid who sits next to me in my history class is generally a douche in the first place. But today was extra special. Another kid was asked a question. I'll even write it as a story to make you feel better.
"Is it this?"
"Sorry, you're wrong," the teacher replied.
"HAHAHAHAHA, EPIC FAIL CANNON," as he made a gun with his hand and mimicked firing it.
"Nice internet reference," I said calmly.
"What?"
"That's from the internet."
"No it's not. It's something my friends made up."
"Fine. But they got it from the internet." I turned my head away as the teacher went in his lecture.
"Go die somewhere." A slight chuckle arose from the rest of the class while I sat there grinning like a fool.
"Whatever you say. Just look it up next time."
"Quit being such a noob."
"Whatever you say."

I ended up out of the class due to schedule changes, but this time I get to sit next to a boy with long hair who never talks and has failed every test he's taken. Oh boy.

Basically, share your story of stupid people that are stupid.