(do) (you) know something?

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(do) (you) know something?

Used to emphasize the importance or severity of the point being made. You know something? I'm sick and tired of your crappy attitude! So one day I simply up and left him, and do you know something? It was the best decision I've ever made. Know something? These layoffs are just the beginning. Things are going to get a whole lot worse.
See also: know

you know something

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 .
See also: know, something