flirt monster 

def: someone who flirts alot but mostly with friends for fun or in serious flirting

you are such a flirt monster.

flirt monster by elyssa July 13, 2004

Flirtmonster 

Someone who incessantly flirts with anyone who passes their standards of looks and general personality. This usually occurs without the flirtmonster even realising because it comes so naturally to them.

Flirtmonsters, we all know one, YES I MEAN YOU, you know who you are.

Flirtmonster by Lol Jay Is A Flirtmonster February 25, 2010