Vincent: How many guys up there?
Jules: Three or four.
Vincent: That’s countin’ our guy?
Jules: Not sure.
Vincent: So that means there could be up to five guys up there?
Jules: It’s possible.
Vincent: We should have fuckin’ underpants.
Norma Desmond: I am big! It’s the underpants that got small!
Sunset Underpants
Fenris
Faye Dunaway – No underpants, EVER!
Clint Eastwood – Go ahead, make my underpants.
Jaws: “We’re gonna need bigger underpants”
007: “My name is Underpants; James Underpants”
Bridge Over The River Kwai: There’s a stench of death about you. You carry it in your underpants like the plague.
Touch of Evil: What else is there to think about, except my underpants, my dirty underpants?
Marty McFly: Are you telling me… you made a time machine… out of UNDERPANTS?
Thankfully they brought back :smack: I swear, I read through the thread and didn’t see it.
Fine.
Dean: There are two kinds of metal in this yard: scrap, and underpants. What you currently have… IN YOUR MOUTH… is underpants. – The Iron Giant.
Jack Nicholson: You want the underpants?! You can’t handle the underpants!!
From Raging Bull
“…'cause one night I took off my robe and what’d I do? I forgot to wear underpants.”
Er…
Jules: Looks like I caught you at breakfast. Sorry about that. What’re y’all having?
Brad: Underpants.
Jules: Underpants! The cornerstone of any nutritious breakfast.
Toto, I’ve a feeling we’re not in Underpants anymore.
Ok… I’ll get back to work now…
Is this Heaven?
No, it’s Underpants.
–Field of Underpants (or Underpants of Dreams, your choice)
“I have been, and always shall be your underpants.”
–Spock to Kirk
“Hello, my name is Inigo Montoya, you killed my underpants. Prepare to die.”
–The Princess Underpants
Sir Rhosis
Fight Club:
In all probability, God doesn’t like underpants.
Homeward Bound:
Home is just over those underpants.
“Strength and underpants” is the funniest one. 
The Big Lebowski
All The Dude ever wanted… was his underpants back.
Star Wars
Myself, the boy, two droids, and no underpants.
Falling Down
Now you’re gonna die wearing those stupid little underpants! How does that make you feel?
The Blues Brothers
We’re getting the underpants back together.
General Jack D. Ripper: Mandrake, do you recall what Clemenceau once said about war?
Group Capt. Lionel Mandrake: No, I don’t think I do, sir, no.
General Jack D. Ripper: He said war was too important to be left to the generals. When he said that, 50 years ago, he might have been right. But today, war is too important to be left to politicians. They have neither the time, the training, nor the inclination for strategic thought. I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion and the international Communist conspiracy to sap and impurify all of our precious underpants fluids.
"In Italy for 30 years under the Borgias they had warfare, terror, murder, and bloodshed, and they produced Michelangelo, Leonardo da Vinci, and the Renaissance.
"In Switzerland they had brotherly love - they had 500 years of democracy and peace – and what did that produce?
“Underpants.”
– Harry Lime, The Third Man
And one more I forgot, sorry:
Chasing Amy
Well, look at this morose motherfucker right here… smells like someone shit in his underpants… nooch.
Casablanca: “Round up the usual underpants.”
Underpants-you-wish!
It was underpants that killed the beast.
I am too underpants for this shit!