Girl Hopper Share definition Flag A guy who starts flirting with a girl immediately after a relationship he recently was in. Wow, he just broke up with a girl and is already flirting with another...Wow, what a girl hopper... Girl Hopper by ohNaasty January 1, 2012 0 0 Get merch Get the Girl Hopper mug. Buy Now — $32.95 See more merch