Party Guinness Share definition Flag a slang term ONLY FOR a 24 oz tall boy of Pabst Blue Ribbon "established in Milwaukee 1844" Costumer says, "Do you carry Pbr's?" Bartender, "Yes." Customer "Can I get a party Guinness?" Bartender, "..." Party Guinness by bud mundy May 27, 2012 0 0 Get merch Get the Party Guinness mug. Buy Now — $32.95 See more merch