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general::
Phrase(s): kick the (natural) stuffing out of someone [and] beat the (natural) stuffing out of someone; take the stuffing out of someone; knock the starch out of someone; knock the stuffing out of someone
Rur. to kick or beat someone severely. • Last time I was in a fight with Joe, he kicked the natural stuffing out of me. • You do that again and I’ll kick the stuffing out of you. • Bill threatened to beat the natural stuffing out of any no-’count rascal who laid a hand on his sister.
McGrawhill's American Idioms And Phrasal Verbs