English version

turncoat

From Longman Dictionary of Contemporary Englishturncoatturn‧coat /ˈtɜːnkəʊt $ ˈtɜːrnkoʊt/ noun [countable] 🔊 🔊 BETRAYsomeone who stops supporting a political party or group and joins the opposing side 🔊 Casson was publicly criticized as a turncoat and a traitor.
Examples from the Corpus
turncoata mafia turncoatAnd it's nothing more than what they deserve, for they're a band of turncoats.Not all such turncoats are detected.
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