VERB
(占了便宜或知道了别人不知道的事情时)洋洋得意地笑，自鸣得意地笑
If you smirk, you smile in an unpleasant way, often because you believe that you have gained an advantage over someone else or know something that they do not know.
例句
Two men looked at me, nudged each other and smirked...
两个男人一面看着我，一面用胳膊肘顶顶对方，笑容里夹杂着一丝得意。
A dozen people were watching her, smirking at her discomfort.
有十来个人在看着她，对她不安的样子幸灾乐祸地笑着。