"Who made that yummy sound?" from Young Frankenstein (Frahnkenshteen). OK, another not-really-iconic, but a favorite in this house.
Does the Slim Pickens bomb-ride-accompanying song from Dr. Strangelove count -- "We'll meet again, don't know where, don't know when"...
So far, each one that's been suggested has got to be The One until I see the next one. How can that be??
Or Harrison Ford's "I hate snakes."
This is a great thread. Thanks!