you know what

you know what

1. A phrase used to convey a realization, often mid-sentence. I wasn't going to go out with you guys tonight, but hey, you know what, I'm in!
2. A rhetorical question posed before a statement one considers to be the blunt truth, often during an argument or heated exchange. You know what, John? I think you never really loved me.
3. A statement asserting that the person to whom one is speaking does in fact know something that they claim not to. A: "What is the matter with you?" B: "You know what!"
See also: know, what
Farlex Dictionary of Idioms.

you know ˈwho/ˈwhat

(spoken) used to refer to somebody/something without mentioning a name: I saw you know who this morning. She didn’t even say hello to me.
See also: know, what, who
Farlex Partner Idioms Dictionary
See also:
  • you know who/what
  • break the bank
  • break the bank, to
  • come to think of it
  • count for
  • count for (something)
  • be (not) the marrying kind
  • be (not) as black as (someone or something) is painted
  • be (not) all beer and skittles
  • come with
References in periodicals archive
I don't think we have to make a big deal about it, because you know what? We' re still who we are.
But you know what? The one thing that I hope doesn't change, though, are all the parents out there--the morns or dads who have daughters, maybe even sons--that look up to Sheryl Swoopes as a great person and a great athlete.
You know what? I'm ashamed to say that I don't go to church as much as I should and as much as I want to, but that's just because I'm never home.
She is our champion: she has logged every superlative in the basketball record books. Now WNBA Houston Comets superstar Sheryl Swoopes makes history again, by coming out about her happy family life with her long-term lesbian love--and signing with Olivia. And she's only just begun
Michaels: You know what? I "had been outed by somebody at work--
Melissa & Tammy: a love story
But when Harper's pushed far enough--well, you know what they say about truth.
Faces of angels: conversations with the stars of HBO's Angels in America
And when somebody "over there" says "You know what? It isn't, and I'm coming back to where you are," it changes everyone's belief system.
You know what the difference was between the day before that phone call and the day after?
You know what? I think so too, and they're here every month.
The real Rosie: 365 days of amazing challenges and feisty decisions turned America's sweethheart into the fighter she's always been--and The Advocate's leading lady for 2002. (Person of the Year)
If you know what you're going to do and why, when you're actually there doing it, you can.
Gale force: Queer as Folk's feisty Gale Harold takes aim against homophobia, fame, and critics of his character, Brian. (Cover Story)
And you know what? Your father knew too." Apparently he just told her out of the blue, "I think he's gay, but I'm sure he'll come to that conclusion on his own." I think there was a question of why I didn't keep my high school girlfriends longer.
Christopher's street