expatiate on

expatiate on (someone or something)

To speak or write about someone or something at length. Don't ask Uncle Harry about his collection of antique binoculars unless you want to hear him expatiate on it for hours on end.
See also: expatiate, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

expatiate on someone or something

to say or write many words about someone or something. She expatiated endlessly on the evils of tobacco. I have heard you expatiate on Harry quite enough, thank you.
See also: expatiate, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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