proofage Share definition Flag The alcahol percentage of groups of multiple liquors or adult drinks. i don't know what the proofage of the majority of german beers is, but in the u.s. it's around 4 percent. proofage by captain thundercrotch November 19, 2010 0 0 Get merch Get the proofage mug. Buy Now — $32.95 See more merch
