a worm will turn


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(even) a worm will turn

Even quiet, submissive people will get angry if you continually agitate them. Sweet little Janine is going to snap at you if you keep bugging her—even a worm will turn sometimes.
See also: turn, will, worm

(even) a worm will turn

even a meek person will resist or retaliate if pushed too far. proverb
See also: turn, will, worm