thagging Share definition Flag when a girl sags her pants to show off her thong Bro 1: "Dude, check out Maria right now." Bro 2: "Hell yea dude!! She is totally thagging." (High fives Bro 1) thagging by CWhit May 10, 2010 0 0 Get merch Get the thagging mug. Buy Now — $32.95 See more merch