[strela]

Spock: "Your use of language has altered since our arrival. It is currently laced with, shall we say, more colorful metaphors, 'Double dumb-ass on you' and so forth."

Kirk: "Oh, you mean the profanity?"

Spock: "Yes."

Kirk: "Well that's simply the way they talk here. Nobody pays any attention to you unless you swear every other word."

Kirk: "Spock, where the hell's the power you promised?"

Spock: "One damn minute, Admiral."

[PackerBoy]

The "Save the Whales" Star Trek movie did have some pretty funny dialogue.