Jackabon Share definition Flag A noun used to describe someone who makes a stupid remark or suggestion. It is a playful insult that is used properly in a joking, light hearted manner. That is the stupidest idea I have ever herd you silly jackabon! Jackabon by Lesismore July 25, 2008 0 0 Get merch Get the Jackabon mug. Buy Now — $32.95 See more merch