Personally, I am a sucker for any line of techno-babble or any such complicated speech as delivered by Dan Aykroyd. The man’s a master at the tongue-twisters. Examples:
“Well, the Chinese were only using a simple polyphonetically grouped 20-square digit key, transposed in Boustrophedonic form with multiple nulls. I cracked it with this.” - Spies Like Us
“Gozer the Gozerian: Good evening. As a duly designated representative of the City, County and State of New York, I order you to cease any and all supernatural activities and return forthwith to your place of origin or to the nearest convenient parallel dimension.” -Ghostbusters
“I don’t care what undercover rock you crawled out from, there’s a dress code for detectives in Robbery-Homicide. Section 3-605.10.20.22.24.26.50.70.80. It specifies: clean shirt, short hair, tie, pressed trousers, sports jacket or suit, and leather shoes, preferably with a high shine on them.” -Dragnet
Also, these lines seem to stick with me:
“Say, Lou, did you hear the one about the guy who couldn’t afford personalized license plates, so he went and changed his name to J3L-2404?” -Marge Gunderson in Fargo
“I’m prepared to scour the earth for that motherfucker. If Butch goes to Indochina, I want a nigger hidin’ in a bowl of rice, ready to pop a cap in his ass.” -Marcellus Wallace in Pulp Fiction
“This? This is ice. This is what happens to water when it gets too cold. This? This is Kent. This is what happens to people when they get too sexually frustrated.” -Chris Knight in Real Genius
“Yippie-ki-yay, motherfucker!” -John McClane in Die Hard
“Careful? Was my mother careful when she stabbed me in ze heart with a clothes hanger while I was still in ze womb?” The Mole in South Park: Bigger, Longer and Uncut
“You know, I can’t think of nothing finer than a fine naked woman holding a gun.” - Frankie Figs in The Whole Nine Yards
And now for one I’ve heard, but I don’t know where it’s from. It sticks with me, too:
“Saxophones?! You gotta fucking be kidding me!”
That’s just a few; If I gave you the whole list, we’d be here for hours. I have a knack for identifying lines from movies, and that causes nearly every memorable movie line to stick with me.