—n. 1. Informal.a sudden or unexpected reversal, as of direction, belief, attitude, or policy.
2. a backward somersault.
3. Also called flip'-flop cir"cuit.Electronics.an electronic circuit having two stable conditions, each one corresponding to one of two alternative input signals.
4. any of several similar devices having two alternative states, the change of state being caused by some input signal or by some change of input.
5. the sound and motion of something flapping, as a wind-blown shutter; a banging to and fro.
6. any backless, usually open-toed flat shoe or slipper.
7. a flat, backless rubber sandal, usually secured on the foot by a thong between the first two toes, as for use at a beach, swimming pool, etc. Cf. thong, zori. 8. (in advertising) a display or presentation, usually on an easel, consisting of a series of pages hinged at the top and flipped over in sequence.
—adv. with repeated sounds and motions, as of something flapping.
—v.i. 1. Informal.to make a sudden or unexpected reversal, as of direction, belief, attitude, or policy: The opposition claimed that the President had flip-flopped on certain issues. 2. to execute a backward somersault.
3. to flap; bang to and fro: The door flip-flopped in the high wind.Also,flip-flapPronunciation: (flip'flap")[key](for defs. 2, 5, 9, 12), flip'flop(for defs. 6, 7).