Définitions
1.VerbTo manage a sailing ship so that the wind strikes them alternately in front and behind, in order to keep the ship in the middle of a river or channel while the current or tide carries the vessel against the wind.
2.VerbTo zigzag, or make a pivot turn by alternately putting the engine in reverse and forward, while turning the wheel or tiller.
3.VerbTo take opposite positions alternately; to flip-flop