go all out

US /ɡoʊ ɔl aʊt/
UK /ɡoʊ ɔl aʊt/
"go all out" picture
1.

to use all of one's resources or energy to achieve something; to do something with maximum effort

:
For their anniversary, they decided to go all out and book a luxury cruise.
We need to go all out on this presentation if we want to win the contract.