umpteen [ˌʌmpˈti:n]

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adj.多的，大量的；n.许许多多

very many; a lot (of)

That punk got into umpteen fights. 那个混混打斗无数。
I told him umpteen times, and yet he can't remember. 我跟他说过好几百回了，可是他就是记不住。