One who tries to be truthy, but who's gut has indigestion. This condition manifests itself in long, drawn out bursts of gas which can be rather painful for the flip-flopper and for those within olfactoric-shot, but are mostly meaningless. The SBD-variety of gastric disturbances can be deadly.
Sadly, Tums, Rolaids or Beano are of no help to the Flip-Flopper. His only hope for relief is for everyone to ignore him so that he may go back to living in relative obscurity.
The origins of the word "Flip-flop" lie, not surprisingly, in the two words "flip-fl" and "op". "Flip-fl" is a Hebrew word which means "One", i.e. an individual. "Op" of course means "who is cowardly and fabricated stories to finagle some Purple Hearts in the Vietnam "war", whatever that is".