1 definition by Corey Vincent Zelinski

A colloquial word used in Newburyport, Massachusetts at least before the Second World War (1939-1945), allegedly shouted from one naval ship to another to identify a resident of Newburyport. Also used to show both affirmation and disapproval ("yes," "no"); first word of the Newburyport slang-phrase "yeat the bun." Yeat can be used as a greeting, as a noun, an interjection, an adjective, and a verb.
John: Yeat!
Mark: Yes, yeat indeed. And how are you doing this fine day?
John: Yeat.
Mark: Ah, not too well. Do you want to go help me do chores?
John: Yeat to that!
Mark: Ah, so you'd rather not. How about the movies.
John: YEAT!
Mark: Great, let's go.

(various usages)
by Corey Vincent Zelinski March 12, 2004
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