U–turn

a changing from one policy or point of view to virtually its exact opposite did an abrupt U-turn when she learned that her would-be suitor was a dot-commer worth millions Synonyms about-turn [British], flip-flop, reversal, turnabout, turnaround, U-turn, volte-faceRelated Words bait and switch, switcheroo; denial, disaffirmance, disavowal, disownment, recantation, renunciation, repudiation, retraction; reconsideration, retreat, second thought; hesitation, indecision, irresolution, shilly-shallying, vacillation, wavering, wobbling (also wabbling)