you know something?

Idioms  

1. Also, you know what? Listen to what I'm going to tell you, as in You know something? He's always hated spicy food, or You know what? They're not getting married after all. Both these colloquial expressions are shortenings (Of Do you know something? or Do you know what?) and are used to emphasize the following statement or to introduce a surprising fact or comment. The first dates from the mid-1900s. The variant, from the late 1800s, should not be confused with what do you know or you know.

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Example Sentences

I sometimes substitute, you know, something that I can’t relate to with other things, as my own process.

From Los Angeles Times

Politically, when someone on your own side is comparing you to dog mess, you know something has gone wrong - especially when they're doing it to try and be supportive.

From BBC

“Hmm. I don’t see the connection. And if I read my cabin boys right,” he added slyly, “you know something you’re not saying.”

From Literature

“Before we start the show, I want to let you know something that I found out just last night,” intoned the veteran comedian.

From Slate

"You're tired, you're confused, you think you know something... but anything can happen," she explained.

From BBC