A Firekiller is an unexpected and OBVIOUSLYunwanted visitor knocking at your door when one is pleasuring oneself, and rudely interrupting said pleasuring, killing "the fire" and forcing you to rush to the door..
fap fap fap DING DONG... O.o *rushes into clothes*....... stupid INSIPIDdonation idiot. x.x gfto you firekiller!