debate on (something)
To discuss a topic at length. If they're debating on their different political views, this could go on all night.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
debate on something
to hold a long and disciplined discussion on a particular subject. We can debate on this all night if you think we will settle anything in the end. Are they still debating on the question?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.