push the boat out
US /pʊʃ ðə boʊt aʊt/
UK /pʊʃ ðə boʊt aʊt/
1.
to spend a lot of money on a celebration or special occasion
:
•
For their anniversary, they decided to really push the boat out and book a luxury cruise.
•
It's her 50th birthday, so we're going to push the boat out and throw a huge party.