“Obviously you would call them Malec,” said Beatriz. “Are you stupid, Simon?”

“You stupid jackass," Ian said.
"Who's got the crush on a worm, bro? You gonna call me stupid?”

“When people look you in the eye and call you stupid, dont look away, but tell them that half of the world is stupid and they are one of them because they are dening their own stupidity.”

“When you do something stupid and die, it's pathetic,” I said. “When you do something stupid and survive it, then you get to call it impressive or heroic.”

“It is the kind of thing that happens to you when you are stupid," said Esa. "Things go entirely differently from the way you planned them.”

“Why would you clone people when you can go to bed with them and make a baby? C'mon, it's stupid.”

“If I could fine you for stupid, I would fine you for stupid.”

“Magnus held up a warning finger. "Don't overstep yourself, biscuit," he said, and moved past them, disappearing into the crowd around the portal.
"Biscuit?" said Simon.
"Believe it or not, he's called me that before," Clary said.”

“Whenever you say that homophobia is stupid, you just get called gay.”

“You are sure your enemy is stupid because he doesn't do things as you would do them. It will make you careless, and your enemy will surprise you.”