know one's stuff

Definition of know one's stuff

informal

  1. :  to be an expert at something When it comes to gardening, she really knows her stuff.

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

stuffplay
  1. :  materials, supplies, or equipment used in various activities: such as

    :  military baggage

    :  personal property

  1. :  to fill by packing things in :  cram

    :  to fill to satiety :  surfeit

    :  to prepare (meat or vegetables) by filling or lining with a stuffing


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