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upmanship

[uhp-muh n-ship]
noun
  1. one-upmanship.
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Also ups·man·ship [uhps-muh n-ship] /ˈʌps mənˌʃɪp/.

Origin of upmanship

First recorded in 1960–65; shortening of one-upmanship
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018