flip-flop

nouns

a decision to reverse an earlier decision
a backless sandal held to the foot by a thong between the big toe and the second toe
an electronic circuit that can assume either of two stable states
is a type of (narrower)
an electrical device that provides a path for electrical current to flow
a backward somersault
is a type of (narrower)
an acrobatic feat in which the feet roll over the head (either forward or backward) and return

verbs

reverse (a direction, attitude, or course of action)