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Meaning of tu quoque*

tu quo•que

Pronunciation: (t kwō'kwe Eng. t kwō'kwē, -kwā, ty), [key]
— Latin. Latin.
  1. thou too: a retort by one charged with a crime accusing an opponent who has brought the charges of a similar crime.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.