2 definitions by rexctang

adj. Having a horrible smell.
Tiffanni: Her breath be on fire!
Mary Kate: The bitch must have halitosis or something.
by rexctang October 14, 2006
Get the on fire mug.
verb. To cause an area to have a foul smell, usually through defecation or passing gas.
Look out; I'm about to light up that bathroom.
by rexctang October 13, 2006
Get the light up mug.