umpteenthEnglishOxford Dictionary of Englishumpteenth /ˌʌm(p)ˈtiːn(t)θ , ˈʌm(p)tiːn(t)θ / ▸ ordinal number informal used to emphasize that something has happened on many other occasions: she checked her watch for the umpteenth time Totti swung his umpteenth corner into Scotland's box.