Shitty Beer Share definition Flag Shitty beer is best defined as natty ice or other cheap beer. also known as "shit beer" or "cat piss" natty ice, keystone light, natty light all excellent examples of shitty beer Shitty Beer by slidewayz March 23, 2009 0 0 Get merch Get the Shitty Beer mug. Buy Now — $32.95 See more merch