stakehorse

(billiards, snooker) A person who bets (backs with a stake) on a player

Japanese Meaning

（ビリヤードやスヌーカーなどで）選手に賭け金をかける人 / 勝負や試合で賭けをする人物

The stakehorse nervously counted his notes as the final frame began, hoping his backed player would clinch the match.

賭けの出資者は最終フレームが始まると緊張しながら札を数え、自分が賭けた選手が試合を制することを願った。

Sense（1）

(billiards, snooker) A person who bets (backs with a stake) on a player

stakehorses

（ plural ）