knock oneself out

Definition of knock oneself out

1 :to cause oneself to become unconscious
  • He hit his head against the table when he fell and knocked himself out.
2 informal :to make oneself very tired by doing work
  • I knocked myself out to get the job done on time.
3 US used to tell someone to go ahead and do something
  • "Do you mind if I use this exercise machine first?" "Knock yourself out."

Word by Word Definitions

knock play
  1. : to strike something with a sharp blow

  2. : to collide with something

  3. : bustle

  1. : a sharp blow : rap, hit

  2. : a severe misfortune or hardship

  3. : setback, reversal

oneself play
  1. : a person's self : one's own self

  2. : one's normal, healthy, or sane condition or self

out play
  1. : in a direction away from the inside or center

  2. : outside

  3. : from among others

  1. : eject, oust

  2. : to identify publicly as being such secretly

  3. : to become publicly known

  1. used as a function word to indicate an outward movement

  1. : situated outside : external

  2. : out-of-bounds

  3. : situated at a distance : outlying

  1. : outside

  2. : one who is out of office or power or on the outside

  3. : an act or instance of putting a player out or of being put out in baseball

  1. : in a manner that exceeds or surpasses and sometimes overpowers or defeats


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to suppress quietly or indirectly

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