“- Mark: Here you go, but be careful, that stuff'll make you stupid.
[someone throws a beer can at Stevo]
- Stevo: Fuck you.
- Mark: Well, stupider than you already are.”

Til Schweiger - Mark
Matthew Lillard - Stevo

“People think it's all about misery and desperation and death and all that shit which is not to be ignored, but what they forget is the pleasure of it. Otherwise we wouldn't do it. After all, we're not fucking stupid. At least, we're not that fucking stupid.”

Ewan McGregor - Mark Renton

- Rory Breaker: Your stupidity must be your one saving grace.
- Nick the Greek: Uh?
- Rory Breaker: Don't "uh" me Greek boy! How is it that your fucking stupid soon-to-be-dead friends thought they might be able to steal my cannabis and then sell it back to me? Is this a declaration of war? Is this some white cunt's joke that black cunts don't get?
Vas Blackwood - Rory Breaker
Stephen Marcus - Nick the Greek

“That was stupidity. Now I have to call an ambulance.”

Diane Venora - Chan Parker

“- The Coachman: I'm collecting stupid little boys.
- J. Worthington Foulfellow: Stupid little boys?
- The Coachman: The disobedient ones who play hooky from school.”
Charles Judels - The Coachman
Walter Catlett - J. Worthington Foulfellow