faire le malin

French

(informal) to get wise, get cute, to act smart, to try to be clever, to be impertinent
Synonyms: frimer, se la péter, faire le fier

Tu feras moins le malin quand la police se sera rendue compte que tu leur as menti. ― You'll be laughing on the other side of your face when the police find out you've been lying to them.

This verb is usually translated by "show off" in translation dictionaries, but this is inaccurate.