ump in English

ump

⇄

noun an umpire.
Ex. For Americans everywhere, there is no thrill like being there when the ump yells, ""Play ball!"" (Time).

ump

⇄

ump, noun, verb.
(Slang.)

ump

⇄

v.i., v.t. to umpire.
Ex. Who's going to ump the game?