sissy pack Share definition Flag A six pack of beer. As in a real man/woman would buy more than 6 beers for a piss up session. Yo, lets grab a couple of sissy packs and roll out a grease wheel and watch the game tonight. sissy pack by Peter Doubt October 27, 2007 0 0 Get merch Get the sissy pack mug. Buy Now — $32.95 See more merch