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show teeth

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show one's teeth

 and bare one's teeth

Fig. to act in an angry or threatening manner. (Alludes to what an angry wolf or dog does.) We thought Bob was meek and mild, but he really showed his teeth when Jack insulted his girlfriend. The enemy forces didn't expect the country they invaded to bare its teeth.

See also: show, teeth

show your teeth

to show that you are angry and prepared to defend yourself Come on, let him know you're angry - show your teeth!

See also: show, teeth