when a girl is giving you deep throat and you go too deep causingl her to throw up and the stomach acids make your wang to turn red and burn.
guy talking to friend: "dude lisa through up on my wang and it made it turn red and burn and she sad it was like a fire dick.
Nasty crap that comes out of your dick that burns like hell. The main cause are loose ass hoes, sluts! It may take a long time to know if you have fire dick.
That bitch burned me, she gave me Fire Dick! :-(