Hmmmm
Jaws: "You're [commonly said as 'We're'] gonna need a bigger boat."
The Terminator: "I'll be back."
Origin Unknown: "I've always wanted to say that." (This one annoys the hell outta me for some reason)
Unknown Origin: "That's what she said." (Again this one is very overused and annoying)
Use of the word "bling" when referring to anything shiny/gaudy in appearance.
"You wouldn't hit a guy with glasses, would you?"
"We [I] have ways of making you talk!" (Hopefully only used in a fun context, preferably in the bedroom.

)
Star Trek: Scotty, beam me up.
Star Wars: "I am your father"
Dragnet: Just the facts ma'am.
That's all the brainpower I can muster for one night. I'll be curious to see what others come up with! Good thread.