nets イディオム

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Hornets' nest

A hornets' nest is a violent situation or one with a lot of dispute. (If you create the problem, you 'stir up a hornets' nest'.)

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stir up a hornets' nest

stir up a hornets' nest
Make trouble, cause a commotion, as in Asking for an audit of the treasurer's books stirred up a hornets' nest in the association. This metaphoric term, likening hornets to angry humans, dates from the first half of the 1700s.