When in the middle of the act of sexual intercourse when one becomes angry for unknown reasons, "
Hulk Smash!!!" is said, Or during climax.
Is also used to refer to loud grunting noises emitted from male
pornstars during a
taping.
"He gave her The Bruce Banner so loud we could hear it from down
the hall."
"uuhn!
UH!
Hulk Smash!!!"