chicken out = am afraid to do something
- You said you would do it! Don't chicken out now!
- At the last minute she chickened out of telling him the truth.
- Sometimes we think we are brave but in a dangerous situation we might chicken out.
- You 're not thinking of chickening out of the job now, are you?
- I wanted to swim in the river but when I saw the big fish in it, I chickened out.
- You can't chicken out of the deal now. You have already signed the contract.