Smirk (verb) – Smile in an irritatingly smug or condescending way
He thought he was so smart and it irked (smirk) me. He was smiling in an irritatingly smug and condescending way.
Examples of smirk (verb) in a sentence
The Olympic runner was in the lead and had a smirk on his face, until he twisted his ankle and fell just meters before the finish line.
The boys tried not to smirk as the teacher told them off.
The little girl had a gleeful smirk on her face as she scooped the tadpoles into the jar.