"snickering" in Chinese (Simplified)
偷偷地笑窃笑
Definition
以低声、偷偷的方式笑，通常因为觉得好笑或在嘲笑某人。
Usage Notes (Chinese (Simplified))
多用于非正式或普通场合，指悄悄的、含有一点嘲弄意味的小笑。常与 at someone/something 连用。不可用于形容大声笑。
Examples
The students were snickering during class.
学生们在上课时**偷偷地笑**。
She started snickering when she saw the funny picture.
她看到有趣的图片时开始**窃笑**。
Stop snickering at your brother.
别再对你哥哥**偷偷地笑**了。
I heard some snickering behind me when I tripped.
我摔跤时听到后面有**偷偷的窃笑**。
The group was snickering at the joke, trying not to get caught.
那群人听到笑话时在**偷偷地笑**，生怕被发现。
He kept snickering during the meeting, which was really distracting.
他开会时一直在**窃笑**，让人很分心。