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to knock oneself out
01
*used to tell someone to go ahead and do something
Dialect
American
AmericanGrammatical Information
Composition
phrasal
Action verb
Regular
Separable
Particle
out
Base verb
knock
Present tense
knock out
3rd person singular
knocks out
Present participle
knocking out
Past simple
knocked out
Past participle
knocked out
Examples
If you want to go through all the files one by one, knock yourself out, but I ain't doing that.
02
*to make oneself very tired by doing work
Examples
I knocked myself out to get the job done on time.
03
*to cause oneself to become unconscious
Examples
He hit his head against the table when he fell and knocked himself out.
