show one's teeth
to show one's anger or strength as a warning to someone not to argue or fight with you

[TahlilGaran] Dictionary of Contemporary English ▲

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!

[TahlilGaran] English Idioms Dictionary ▲

show one's teeth
to show one's anger or strength as a warning to someone not to argue or fight with you
Our supervisor showed his teeth when I began to argue with him about my job.

[TahlilGaran] English Idioms Dictionary ▲

show one's teeth
v. phr. To show anger; show belligerence.
He is a very mild, private person, but during a tough business negotiation he knows how to show his teeth.

[TahlilGaran] English Idioms Dictionary ▲