a stab in the back

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a stab in the back

A betrayal; an act of treachery. It felt like a stab in the back to hear that Paul was going out with my ex-girlfriend. The campaign coordinator's mid-race shift of allegiance will be quite a stab in the back for the incumbent president.
See also: back, stab

stab someone in the back

 
1. Lit. to thrust a knife into someone's back. Max planned to stab his hostage in the back if he screamed. The murderer stabbed his victim in the back and fled.
2. Fig. to betray someone. I wish you would not gossip about me. There is no need to stab me in the back.
See also: back, stab

stab in the back, a

A betrayal of trust, an act of treachery, as in Voting against our bill at the last minute was a real stab in the back. It is also put as stab someone in the back, meaning "betray someone." For example, Don't trust George; he's been known to stab his friends in the back. Both the noun and verb forms of this idiom, alluding to a physical attack when one's back is turned, date from the early 1900s.
See also: stab

a stab in the back

a treacherous act or statement; a betrayal.
See also: back, stab

stab (someone) in the back

To harm (someone) by treachery or betrayal of trust.
See also: back, stab