1. The movement or sound of repeated flapping. 2. Informal A reversal, as of a stand or position: a foreign policy flip-flop. 3. A backless, often foam rubber sandal held to the foot at the big toe by means of a thong. 4. A backward somersault or handspring. 5. Electronics An electronic circuit or mechanical device capable of assuming either of two stable states, especially a computer circuit used to store a single bit of information.
