—n.
1 a usu. rubber sandal with a thong between the big and second toe.
2 esp. US a backward somersault.
3 an electronic switching circuit changed from one stable state to another, or through an unstable state back to its stable state, by a triggering pulse.
—v.intr. (-flopped, -flopping) move with a sound or motion suggested by 'flip-flop'.
Etymology: imit.
Useful english dictionary. 2012.