chicken out

US /ˈtʃɪk.ɪn aʊt/
UK /ˈtʃɪk.ɪn aʊt/
"chicken out" picture
1.

desistir por medo, amarelar, dar para trás

to decide not to do something because you are too frightened

:
I was going to try bungee jumping, but I chickened out at the last minute.
Eu ia tentar bungee jumping, mas desisti no último minuto.
He was going to ask her out, but he chickened out.
Ele ia convidá-la para sair, mas desistiu.