fight it out
中上級 (B2) informal
To solve a disagreement or decide a winner by fighting or competing until someone wins.
"The two candidates were left to fight it out in the final debate."
文脈の中で聞く
This Roman ritual made conquered kings beg to die | Mary Beard
Big Think · 16:12
Julius Caesar and Pompy fight it out in the 40s
Is the war in Iran over? #shorts
Vox · 1:11
leaving everyone else in the region behind to fight it out.