A fork of Rural Dictionary
To light up a joint or a blunt
Fire it up kid so we can get to kickin' it.
Guy1: Brendon said he will fight you after school. Guy2: Well then, fire it up bitch!
To insult, crack jokes, or belittle one.
I'm about to fire you up!
1. to excel, to kick-ass, to dominate 2. to humiliate opponent in sports-related activity 3. phrase popularized in the mid-1990's in Chicago, IL
When he defeated his nemesis in Madden Football for the tenth time in a row, his friends remarked, "Fire it up, Sporto!"