go all the way
US /ɡoʊ ɔl ðə weɪ/
UK /ɡoʊ ɔl ðə weɪ/

1.
to have sexual intercourse
:
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They had been dating for months, but she wasn't ready to go all the way.
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In some cultures, it's expected that couples don't go all the way before marriage.
2.
to complete something fully or to the maximum extent
:
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If you're going to start a business, you have to be prepared to go all the way.
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The team decided to go all the way and implement the most ambitious plan.