What does it mean? Maybe 'shut up your mouth'? Maybe 'go on speaking'?
Context. A conversation (the sheriff is on the phone, the journalist in the jail). The sheriff is speaking with the newspaper editor, who is the journalist boss.
Sheriff: Hello. Yeah, speaking. Journalist (in jail): If it's my editor, I demand to talk to him. Sheriff: Keep your shot on, newspaper man, it's your editor. Go ahead. Wait a minute. Where do you say it was? Hold the phone.
He is the sheriff of a small town in Kansas. It happens in the '40s.
Top answer
Keep your shirt on. ~ Don't be in such a hurry. Wait.
— CalifJim
Keep your shirt on.
~ Don't be in such a hurry.
Wait.
~ (also) Don't get so angry and upset.
Also: Hold your shirt.
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