наставить рога*

* to put horns on [somebody]

Russian Russia

Expression USED On Occasion BY Older Generations

(v.) To cheat on someone. Depictions of a stag-horned cheated-on man are often in jokes and caricatures relating to cheating.

"Он убил свою жену за то, что она наставила ему рога."

"He has killed his wife because she put horns on him."