gackie Share definition Flag Gackie is a work my siblings, cousins and I used to describe feces or shit. Without sounding vulgar, we could make light of crap by using the word Gackie. Did you see that large gackie in the toilet bowl? gackie by Hardie September 3, 2006 0 0 Get merch Get the gackie mug. Buy Now — $32.95 See more merch