Shades of Grey?
Scotty: "I kinnae flog the engines any harder, Kiptin, or they're gonna blow!"
Uhura: "Communicating the safe word on all frequencies, but the Klingons are still firing rapidly at us, sir."
Kirk: "Damn those wily Klingons. Why did the safeword have to be 'Harder'?!"
Kirk: "Spock's ears? Oh, he caught them in a, uh, Chinese rice picker."
Spock: "Chinese rice picker?"
Kirk: "...it's an exquisite and unusual sexual preference, to be sure. Bear it proudly."
McCoy: "Dammit, Jim -- I'm a doctor, not a tribble spelunker!!"