Duke It Out 

To fight, usually fist fight. Probably from John 'the Duke' Wayne movies where he would always end up fighting with someone.

You want to teach him a lesson, duke it out.

Duke It Out by BobLoblaws October 13, 2006

Duke It Out 

To pay your opponent twelve million pounds

Prince Andrew was going to plead his innocence in court but decided to Duke It Out with Virginia Giuffre instead

Duke It Out by MageTitan February 16, 2022

duke it out 

the act of pooping or taking a dump.

boy1: hey were where you last night at the party?
boy2: i had to duke it out.
boy1: oh.

duke it out by thunder_storm996 June 27, 2008