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A word that usually prescribes an uncertain number of occurances. This is usually said in the reference of the numbers 13-19 (hence the 'teen'), but it can be in reference to any number within reason.

Hence 'umteenth'
I got umpteen calls from this pranker yesterday.

I dyed my hair for the umpteenth time today.
by Cheezu$ July 25, 2003
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An expression which denotes an abundance, large quantity, huge amount or a load of something. The word "umpteenth" was derived from "umpteen" and means "for-God-knows-which-time".
There was an umpteen of fidgety tourists in the city endeavouring to do as much sightseeing as it was possible.
by necrotism June 04, 2007
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