you use this to decline anything a person says

Phrase: commonly used in the beginning, middle, or end of a sentence. Used as a filler for "um," "and," and "dude." Commonly paired with another phrase, "Scoinaaan." Does not need to refer to anything one actually said or a statement from the past.

An excuse to retell a good story or joke for those who missed it the first time.

A phrase that is used when someone hears you wrong and tries to correct you by saying what you originally said.

Expressing anger towards one or trying to explain a situation

An imperious reply that an authority figure --- most often a parent --- impatiently tells someone under his/her care when he does not wish to admit that there is literally no good/valid reason why said dependent should have to comply with the directive, but the authority figure doesn't want to admit it.

an angry ass phrase you yell when you want someone to do something RIGHT FUCKING NOW.
the sentence prior must have contained right now
originated from the Need For Speed: Heat trailer, and made popular by it's comment section