aww mass Share definition Flag The exclaimation made when entering upon a situation of distress, used interchangably with mass fat person one: Dammit the shield's annoying person two: AWW MASS I just bump into one!! aww mass by BAM! and the dirt is gone! January 9, 2008 0 0 Get merch Get the aww mass mug. Buy Now — $32.95 See more merch