flip-flopper

基本解釋

The great flip-flopper does not convince the conservative base.
這位大騎牆派竝不能說服保守派基層。
Exposed as an un-Christian flip-flopper and shorn of the momentum that came from seeming inevitability, she will see her voters melt away.
羅塞夫被揭露爲(wèi)一個(gè)言行不一的非基督教徒，竝且喪失了必然獲勝的勢頭，她的選民將漸漸消失。
Apart from being dull and being Mormon, which still fans suspicions, the famous flip-flopper is also—with the exception of his fellow Mormon, Jon Huntsman—the least authentic conservative in the race.
除了沉悶無聊，以及仍然招來懷疑的摩門教徒身份外，這位著名的騎牆派可能也是這次競選中（除了另一位摩門教徒洪博培以外）最不正宗的保守派。

Although does that give Republicans an opportunity to paint another Democratic presidential candidate as a flip-flopper?
NPR: Analysis: Congress And The Cost Of Energy
Nobody wants to be labeled a flip-flopper, not even a member of the FOMC.
FORBES: Through the FOMC's Looking Glass: An Orgy of Transparency
Consciously or otherwise, they reinforce Labour's attack on him as Chameleon Dave, the flip-flopper who believes in nothing.
ECONOMIST: Bagehot