Mosey

wiktionary

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Unknown. Originally attested in Southern US dialects. Suggested origins include:

etymonline

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mosey (v.)

1829, "move off or away, get out," American English slang, of unknown origin, perhaps related to British dialectal mose about "go around in a dull, stupid way." Or perhaps from some abbreviation of Spanish vamos (see vamoose). Related: Moseyed; moseying.