Definition of "turncoat" [turn•coat]

• One who traitorously switches allegiance. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The very thing Specter sought to avoid by becoming a turncoat is now coming to pass."
• "Does anyone know why this turncoat is still allowed to live in Washington D.C. He did nothing to help Al Gore 8 years ago and he only here to play get back to the democrats."
• "Hobbesian philosophy seemed to have been on target, since offering Indian indigenous leaders the reward and opportunity to engage in turncoat behavior toward their own people managed indeed to establish collaborative efforts with British colonialists."