If you describe someone as sardonic, you mean their attitude to people or things is humorous but rather critical.
例句
...a big, sardonic man, who intimidated his students.令学生胆怯的身材魁梧、爱嘲讽人的男人...a sardonic sense of humour.冷嘲式的幽默感
英汉词典释义
adj.
嘲笑的;讥笑的
She gave him a sardonic smile.她朝他讥讽地笑了一笑。
英英词典释义
Adjective
1. disdainfully or ironically humorous; scornful and mocking;
"his rebellion is the bitter, sardonic laughter of all great satirists"- Frank Schoenberner"a wry pleasure to be...reminded of all that one is missing"- Irwin Edman