Meaning of “you know something?” in the English Dictionary

british dictionary

"you know something?" in British English

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you know something?

also you know what? informal

said before giving an opinion or a piece of information:

You know something? I don't think I like that man.
You know what? I think it's time to go home.

(Definition of “you know something?” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"you know something" in American English

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you know something

also you know what

infml used before giving an opinion or a piece of information:

You know what? I think it’s time to go home.

(Definition of “you know something” from the Cambridge Academic Content Dictionary © Cambridge University Press)