return the compliment
Also, return the favor. Repay someone in kind, as in Her political opponent came out with a smear campaign, and she returned the compliment. Neither the compliment nor the favor in this idiom is necessarily desirable. [First half of 1700s]
“Compliment” vs. “Complement”: How To Pick The Right WordCompliment and complement are commonly confused terms because they're pronounced alike and originally shared some meanings ...
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.