This phrass refers to your elder uncle in chinese. Very often, when some one is mad at you, he or she will use this phrase to insult you in a rude manner. It looks like it has two meanings. Which meanings expressed by this phrase depends on the speaker's tone.
by Super Chinese October 16, 2017
This phrase is used as a cursing word in China. No exact meaning can be translated. It's like a mimetic word such as hahaha. But this cursing expression is so popular in China today.
by Super Chinese October 16, 2017