GI Joke Share definition Flag A singular person with no hopes of ever having a life, Also one who probably wishes he was a member of the military. GI Joke is a loser. Wow that sack of shit reminds me of GI Joke. GI Joke by 777 July 25, 2003 0 0 Get merch Get the GI Joke mug. Buy Now — $32.95 See more merch