floozer Share definition Flag When you want to call someone a "fucking loser" in a short, euphamistic, funny way. Mark got dumped by his pretty, intelligent girlfriend after cheating on her with some ugly, STD-ridden slutbag. What a floozer!! floozer by 111222 December 27, 2005 0 0 Get merch Get the floozer mug. Buy Now — $32.95 See more merch