titter
verb [ I ] mainly UK uk/ˈtɪt.ər/ us/ˈtɪt̬.ɚ/
（常指对不该笑的事物）紧张地笑，傻笑
to laugh nervously, often at something that you feel you should not be laughing at
A couple of the younger teachers tittered at his dirty jokes. 听完他讲的黄色笑话，几个年轻点的教师痴痴地笑了起来。
Their performance left the audience tittering with embarrassed laughter.
Synonym: giggle
- More examples
- She tittered and blushed.
- Schoolkids usually titter hysterically at any nudity.
- She tittered like a schoolgirl telling a naughty story.