flibbergibbit Share definition Flag the planet on which strange boys that wear socks with sandles rule. "dude. flibbergibbit rocks. but the people who hail from that strange land are pretty homosexual." flibbergibbit by flibbergibbitfredfredburger June 20, 2007 0 0 Get merch Get the flibbergibbit mug. Buy Now — $32.95 See more merch