A Fangirl's Life.. Fangirl - A rabid breed of human female who is OBSESSED with either a fictional character or an actor. Similar to the breed of fanboy. Fangirls congregate at anime conventions and livejournal. Have been known to glomp, grope, and tackle when encountering said obesessions ; an OBSESSIVE female fan.. (c) Google/UrbanDictionaryAll Rights Reserved