OWAAAA Share definition Flag 1. A girl's word, used in the place of "OH MY GOD" or a girl's favourite "OMG"Meaning something very serious. Did you hear that Graham asked Shelly out last night?"OWAAAAA" no way he did not!! OWAAAA by Undercover Ger November 18, 2012 0 0 Get merch Get the OWAAAA mug. Buy Now — $32.95 See more merch