somebody who is attracted to having sex while on fire or with someone who is on fire, or both at the same time.
Person 1: Did you hear? Jenny is a pyrophiliac.
Person 2: What the hell is a pyrophiliac
Person 1: Idk, some dumbass wrote about it on urban dictionary
Sexual arousal from seeing or touching the buttocks of another person. The term is not gender-specific. A person who is thus aroused is a "pygophilist" or "pygophile"; "pygophiliac" may be used if the arousal could be considered abnormal, pathological or extreme. In a finer sense, "pygophilist" can be used to infer a person whose predilection includes actively touching buttocks, as the suffix -ist connotes "one who does", whereas "phygophile" (-phile, "one who likes) could include those who are content merely to look at buttocks.
Pygophilia is not that uncommon - my best friend is a total pygophilist - but that guy at the office has had his hands on more ass than a donkey breeder; he's a complete pygophiliac.