Dalao (大佬), widely used in the Chinese online community (especially tech and gaming), means a person of great power, ability and/or wealth. It is generally used as a term of admiration.

In Chinese and many Asian cultures, it's considered a way to show one's respect by serving tea for them.

This phrase was initially found in a Chinese hack-and-slash-waifu-mobile game Honkai Impact 3rd as an in-game achievement name.
-James just wiped out 10 enemies with a single blow!
-Serve tea for dalao!
by God of ACGN October 26, 2018
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Always gets you on the one uppers that make you think they're smarter than you are.
by Everything Nicer July 31, 2021
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