sell someone out
- to betray someone
- to let someone’s secret out
- to reveal damaging information about someone
- The company had put a lot of trust on him, but he sold them out by leaking confidential information to the competitors.
- Celebrities have a hard time keeping secrets. Most of the time its their close friends who sell them out to the media.
- I had trusted you to keep my secret. I can’t believe that you sold me out!
- They wanted to keep the news under wraps to avoid a scandal, but someone on the inside sold them out.
- Can I trust you with this piece of information or will you sell me out?
- Hardened criminals are tough to crack. They don’t easily sell their accomplices out, even if it means torture for them.
- There has been a misunderstanding! Why would I sell you out? It must have been someone else.
- He can be trusted with that information. He will not sell us out under any circumstances.
The origin of this phrase is not clear.
viper in bosom
- a person who deceives you after receiving help from you
- an unappreciative friend
- I got my friend a good position in my company and all he did is convinced my manger to get him the designation I had in the project. He was no more than a viper in my bosom.
- He provided Anaya shelter in his house when she was rendered homeless & she kept stealing money from his cupboard until he knew that she was a viper in his bosom.
- She was confident of their relation being truthful and transparent to only know that she has nursed a viper in her bosom all these years: Her husband eloped with a younger woman of the age of his daughter.
- Only after the police arrested him for sheltering a friend involved in terrorist activities did he know that all these years he had been nursing a viper in his bosom.
The phrase has originated from one of the tales of Aesop, in which a farmer who gives shelter to a viper dying from cold is eventually bitten by the viper after its recovery. The similar thought is also found in Latin ( insinu viperam habere) & the expression is found in various forms in English from late 16th century after it was referred by Shakespeare and Chaucher.
show true colors
Meaning: betray, reveal oneself as one is really.
Example: I trusted her blindly but when I was in need too much and called her for help, she showed her true colors and even she don’t pick my phone now.