"To chicken out
", it´s a very usual expression.
There is even the so-called "chicken games", the ones that ressembles a Russian Roulette (without the bullets, but danger involved.) The one that wich principle is somehow "let´s see who blinks first this time!".
In fact, most the time it doesn´t show courage but sheer stupidity or the will to gamble with one´s own life, just for the sake of it!http://www.teclasap.com.br/o-que-chicken-out-quer-dizer/https://en.wikipedia.org/wiki/Chicken_(game)
Just my two cents, though. Donay had nailed it! LOL.