knock out Rate this phrase:(3.00 / 1 vote)
To exhaust a personal or animal.

Running errands all day really knocked him out.

Additional definitions for 'knock out':

knock outTo strike or bump someone or something out.
knock outTo render someone unconscious, as by a blow to the head.
knock outTo put someone to sleep.
knock outTo complete, especially in haste; knock off.
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"knock out." STANDS4 LLC, 2018. Web. 17 Jul 2018. <>.

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