Definition of smirk verb from the Oxford Advanced American Dictionary

 

smirk

 verb
verb
NAmE//smərk//
 
[intransitive]Verb Forms present simple I / you / we / they smirk
 
he / she / it smirks
 
past simple smirked
 
-ing form smirking
 
 
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to smile in a silly or unpleasant way that shows that you are pleased with yourself, know something that other people do not know, etc. It was hard not to smirk. He smirked unpleasantly when we told him the bad news.
She had a self-satisfied smirk on her face.