expostulate about

expostulate about (someone or something)

To engage in a passionate discussion or argument about someone or something. Oh boy, steer clear of Uncle Ed if he's expostulating about politics again.
See also: expostulate
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

expostulate about someone or something

 and expostulate on someone or something
to comment or argue intensely about someone or something. He always seems to be expostulating on something. Why can't he simply say "Yes" or "No"? Sam is expostulating on Bill's many shortcomings again.
See also: expostulate
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Before hurrying on, then, as theory and theorists have a penchant for doing, to explain the phenomenon, to say what it means about definitions of narrative, to expostulate about narrative across the media, to reflect on how it intersects with the concept of narrativity, to do any of the thousand other intellectual operations we're all so fond of, can we just hold our gaze on this plenty long enough to say, "Look at all that.
In the West, far too many commentators expostulate about Islam who have no knowledge of Arabic.