blagua Share definition Flag A blagua is an underwater blowjob. Usually blaguas happen in hot tubs. "Dude, I was in a hot tub with my girlfriend and she went underwater to give me a blagua!" blagua by compound miter saw dude January 19, 2017 0 0 Get merch Get the blagua mug. Buy Now — $32.95 See more merch