bottle out
US /ˈbɑː.t̬əl aʊt/
UK /ˈbɑː.t̬əl aʊt/

1.
lâcher l'affaire, se dégonfler
to lose one's nerve and decide not to do something
:
•
He was going to ask her out, but he bottled out at the last minute.
Il allait l'inviter à sortir, mais il a lâché l'affaire à la dernière minute.
•
Don't bottle out now, you've come too far!
Ne lâche pas maintenant, tu es allé trop loin !