A phrase used to describe complete lack of interest in what another person is saying, considered rude or
necessary, depending on the
conversation.
Alternatively, this can be used as a defensive phrase,
see examples, to attempt to save one's self from ridicule.
As a third option, it is also used as a peacemaking, forgiving phrase.
Rude-
Josh: My grandfather passed away this
morning.
Jake: So what?
Necessary:
Josh: Oh my
god, I think my shoelace is coming undone!!!!111oneone!!!
Jake: ...so what?
Defensive:
Josh: You'
re an ass, man.
Jake: So what?
Forgiving:
Josh: I'm sorry I called you an ass.
Jake: Forget about it, man. So what?