Henck Share definition Flag Henck is where a fat person wears tight T-shirts thinking that they have a muscular body. (opposite to Hench). Keith: Look at that fat guy with the tight t-shirt.Tim: He's Henck! Henck by TheSpiderProvider October 7, 2010 0 0 Get merch Get the Henck mug. Buy Now — $32.95 See more merch