put one's money on

/pˌʊt wˈɒnz mˈʌnɪ ˈɒn/

/pˌʊt wˈʌnz mˈʌni ˈɑːn/

to put one's money on

‌to risk money in order to place a bet on something in a competition, especially on horses, dogs, etc.

*** to feel very sure that something is true or that somebody will succeed