Fickle Fucker Share definition Flag a piece of shit person that goes back on there word. Turns around and fucks your girl. Hey man, last week my friend botched up our relationship big time being a fickle fucker. Fickle Fucker by Weekend Wild Man's Sidekick January 8, 2010 0 0 Get merch Get the Fickle Fucker mug. Buy Now — $32.95 See more merch