get back girl Share definition Flag the girl a guy dates to get back at an ex, or to try to make an ex jealous He saw his ex in the bar with her new man so he called Emily to come to the bar to meet him. She's his get back girl, again. get back girl by Crystal Stone November 27, 2011 0 0 Get merch Get the get back girl mug. Buy Now — $32.95 See more merch
