Umpteen meaning
Relatively large but unspecified in number.
Umpteen reasons; umpteen guests.
adjective
(informal, often slightly derogatory) Relatively large but unspecified in number.
She's taking umpteen friends with her to the party.
determiner
A great number of; very many.
adjective
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Origin of umpteen
- Slang ump(ty) dash in Morse code (of imitative origin) -teen (as in thirteen)
From American Heritage Dictionary of the English Language, 5th Edition
- umpty (“colloquial name for the dash ""”" in Morse code") +"Ž -teen
From Wiktionary