one-upped; one-upping; one-ups
Definition of one-up
(Entry 1 of 2)
: to practice one-upmanship on
one up
adjectiveDefinition of one up (Entry 2 of 2)
: being in a position of advantage
—usually used with on
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Merriam-Webster unabridged
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Time Traveler for one-up
The first known use of one-up was in 1919
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