chicken out

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

退缩, 临阵脱逃, 打退堂鼓

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.
我本来要去尝试蹦极,但最后一刻我退缩了
He was going to ask her out, but he chickened out.
他本来要约她出去,但他退缩了