Are you asking about a tu quoque argument in logic?
A tu quoque is a logical argument, which attempts to point out that "you too or you also" (the Latin translation), are doing what is being argued (or discussed).
I would say that this is like the pot calling the kettle black.
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The English translation for "quoque" is "also."
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et al. (et alii) = "and others"
etc. (et cetera) = "and the others" (implies that they are known to the audience)
See the related links (below) for more information.