know what one is talking about

Definition of know what one is talking about

  1. :  to be saying what is correct from actual knowledge or experience with something Take her advice. She knows what she's talking about. “He said the movie is boring.” “Don't listen to him. He doesn't know what he's talking about.”

Word by Word Definitions

knowplay
  1. :  to perceive directly :  have direct cognition of

    :  to have understanding of

    :  to recognize the nature of :  discern

  1. :  knowledge

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

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

    :  who

  1. :  why

    :  in what respect :  how

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

    :  whatever

    :  any

talkplay talking
  1. :  to express or exchange ideas by means of spoken words

    :  to convey information or communicate in any way (as with signs or sounds)

    :  to use speech :  speak

  1. :  the act or an instance of talking :  speech

    :  a way of speaking :  language

    :  pointless or fruitless discussion :  verbiage


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