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

1.
desistir, amarelar
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.
Ele ia convidá-la para sair, mas desistiu no último minuto.
•
Don't bottle out now, you've come too far!
Não desista agora, você já chegou muito longe!