you know what?

idiom

Definition of you know what?

informal
1 used to emphasize the statement that comes after it
  • You know what? I never trusted her.
  • She lied to me again, but you know what? I really just don't care anymore.
2 used to get someone's attention
  • Hey, you know what? I'm hungry.

Word by Word Definitions

you play
  1. : the one or ones being addressed — compare thee, thou, ye, your, yours

  2. : one

know play
  1. : to perceive directly : have direct cognition of

  2. : to have understanding of

  3. : to recognize the nature of : discern

  1. : knowledge

what play what?
  1. used as an interrogative expressing inquiry about the identity, nature, or value of an object or matter

  2. often used to ask for repetition of an utterance or part of an utterance not properly heard or understood

  3. : who

  1. : why

  2. : in what respect : how

  1. used as an interrogative expressing inquiry about the identity, nature, or value of a person, object, or matter

  2. : how remarkable or striking for good or bad qualities

  3. : whatever


you-know-what

noun

Definition of you-know-what

informal
1 used in speech to refer to something that is not named but is known to both the hearer and speaker
  • I've hidden the you-know-what in the closet.
2 used in place of a rude or offensive word in order to express anger or annoyance
  • He's a complete you-know-what.

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