An archaic or dialectal interjection used as an exclamation; may also refer to a yeoman.
Uncertain origin, possibly dialectal Middle English. Could relate to archaic interjections or be a variant of 'heyo' or similar exclamatory forms.
This word is so archaic that it barely appears in modern dictionaries—it's a linguistic fossil showing how interjections fade away when cultures change; nobody uses 'yeo' anymore because the emotions or situations that prompted it no longer exist.
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