Definition of "flip-flop"

flip-flop

/ˈflɪpˌflɒp/

noun
plural flip-flops
1. (US, UK, Fiji) A sandal consisting of a rubber sole fastened to the foot by a rubber thong fitting between the toes and around the sides of the foot.
2. A change of places; an inversion or swap.
  Quotations
  On the break for strong left, everything remains the same, except for the flip-flop of positions.
  1964, Scholastic Coach, volume 34, page 18
  1. (US) An instance of flip-flopping, of repeatedly changing one's stated opinion about a matter.
3. (computing, electronics) A bistable; an electronic switching circuit that has either two stable states (switching between them in response to a trigger) or a stable and an unstable state (switching from one to the other and back again in response to a trigger), and which is thereby capable of serving as one bit of memory.
  Quotations
  Ten two-state flip-flops […] were formed into ten-stage ring counters representing each decimal digit in the ten-digit accumulators […]
  2012, George Dyson, Turing's Cathedral, Penguin, published 2013, page 72
4. The sound of a regular footfall.
5. A somersault.
6. (US, slang, truck driving) A return trip.
  Quotations
  We'll catch you on the flip-flop. This here's the Rubber Duck on the side. We gone, 'bye, 'bye.
  1975, “Convoy”, in C.W. McCall, Chip Davis (lyrics), Black Bear Road, performed by C. W. McCall
verb
third-person singular simple present flip-flops, present participle flip-flopping, simple past and past participle flip-flopped
1. To alternate back and forth between directly opposite opinions, ideas, or decisions.