Baseball Umpire, Umpire
noun
A baseball base judge is one who judges things on a baseball field. This is a baseball umpire, or more simply, an umpire.
るいしん
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あの一塁の塁審、試合中に屁をこきまくってたぜ。
The umpire at first base kept farting during the game.