Gifuckinggantic Share definition Flag An obscenely large quantity that can only truly be communicated with the term "fuck" interlaced into it - "Wow, that person in the flower-print mumu is gifuckinggantic!" Gifuckinggantic by cooldude5000 August 5, 2010 0 0 Get merch Get the Gifuckinggantic mug. Buy Now — $32.95 See more merch