1. (in crime) An obscene variant of rape where either the rapist or the rape(e), or in some cases both; are set alight prior to rape. done out of pure mania,curiosity, and boredom.
Popular where i'm from.
2.(in videogames) To totally own someone, often wit some flame based weapon.
1.That crazy guy kidnapped and flame raped my grandma! I'm so mad... but also a little impressed.
2. Dude, i just got flame raped by some douche in Call Of Duty.