A firetard is when someone makes you so angry you feel a fire start in your chest then it blows out and spits out words that could potentially hurt someone but you did not intend it to. Such as swearing when you are mad, fucktards are uncontrollable.
Taz, also know as tazzy, from the slang "map a tazzi" in reference to the shape of tazmania. My Taz is on fire, or I got a firetaz can someone put (it) out! man, homie that biouch gotz a firetaz, watch out for that shit!
Person1: Why did youlike my status? What's there to like about my dog dieing??
Person2: Chill man, I was just doin' a fikret. I didn't even read your status.