noun
winning horse; winner
Refers to a horse that wins a race, or figuratively to a winner in any competition. Often used in the phrase 勝ち馬に乗る (to back the winning side).
彼は勝ち馬に乗って大金を手に入れた。
He backed the winning horse and made a lot of money.
選挙ではいつも勝ち馬に乗ろうとする人がいる。
In elections, there are always people who try to jump on the winner's bandwagon.
Compound of 勝ち (winning) and 馬 (horse).