chicken out of something
chicken out of (something)
slang To refuse to do something due to fear (real or perceived). Jumping off the high-dive is fun! Don't chicken out of it now! I didn't chicken out of anything, I just changed my mind, OK?
chicken out (of something)
in. to manage to get out of something, usually because of fear or cowardice. Freddy chickened out of the plan at the last minute.