duke it out
US /duːk ɪt aʊt/
UK /duːk ɪt aʊt/

1.
bertarung, berkompetisi
to fight or compete to resolve a dispute or determine a winner
:
•
The two rivals decided to duke it out in the final round.
Kedua rival memutuskan untuk bertarung di babak final.
•
Let's just duke it out and see who's right.
Mari kita bertarung saja dan lihat siapa yang benar.