“- Joker: I'm not stupid, you're stupid.
- Karla: No you're stupid.
- Joker: Don't call me stupid, I'm sensitive.
- Karla: Just where's the car keys?
- Joker: You're stupid.
- Karla: Bye.”
Jacob Vargas - Joker
Lisa Rodrìguez - Karla

“Can't believe they're my blood. I.Q. of sloths and the manners of banshees. He's a mechanic, she's a homemaker. He knows as much about cars as a beauty queen, and she bakes cookies, taste like wing nuts. As for the tots, they're twits.”
Al Pacino - Lieutenant Colonel Frank Slade

“In the Firpo family, the man with half a brain is king.”
Nicolas Cage - Bill Firpo

“- Assistant Mechanic: Never heard of no one so shit-all stupid as you drivin' off that road. You musta got manure for your brains.
- Clark Griswold: Yeah, well, I'm from out of town.”
John Diehl - Assistant Mechanic
Chevy Chase - Clark Griswold

“When a man gets a hard on, you know where the blood comes from, right? You know where the blood comes from, right? His head and his feet. So, A - he's stupid, and B - he can't run.”
Isaiah Washington - Savon Garrison