Edited because Beretta92F already posted the "Replica" vs. "Desert Eagle Point Five O" quote - probably one of the better gun movie quotes of all time.
Here are some other random quotes from the DVD I'd choose:
"Bricktop: Do you know what nemesis means? A righteous infliction of retribution manifested by an appropriate agent. Personified in this case by a 'orrible ****. Me."
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"Bricktop: Go and put the kettle on.
Turkish: You take sugar?
Bricktop: No thank you, Turkish. I'm sweet enough."
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"Turkish: What is a gun doin' in your trousers?
Tommy: For protection.
Turkish: Protection from what? Zee Germans? What's to stop it blowin' your bollocks off every time you sit down?"
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"Turkish: Well why didn't you bust a cap in his a** then Tommy? Mind you, you'd do more damage if you threw it at him.
Tommy: What? You saying I can't shoot?
Turkish: Oh no Tommy, I wasn't saying you can't shoot. I know you can't shoot. "
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"Mickey: Hey Ma! Come have a look at the size of this fella! Bet you box a little, can't you sir? Aye. You look like a boxer."
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"Mickey: Ahhhh save your breath to cool your porridge. Now look, she wants a hack with two roof light ??????? and uh, scour cushions with matching checkpoint cover. Yeah. Right.
And she's terribly partial to periwinkle blue boys.
Have I made myself clear boys?
Turkish: Yeah, that's perfectly clear Mickey, yeah. Just give me one minute to confer with my colleague. (to Tommy) Did you understand a single word of what he just said?"
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"Cousin Avi: Speak English to me Tony. I thought this country spawned the ******* language, and so far, nobody seems to speak it."
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"Customs Agent: Anything to declare?
Cousin Avi: Yeah, don't go to England."
-Snatch-