you bet your ass

Also, you bet or you can bet your bottom or bottom dollar or (sweet) life. You can be absolutely sure, as in You bet your ass I'll be there, or You can bet your sweet life that was Bill with another woman, or Are you coming?—You bet I am. All these phrases in effect mean that you can be so sure of something that you can wager your body or life or valuables on it; ass is considered vulgar, and bottom dollar means “last dollar.” [Colloquial; second half of 1800s]

Words nearby you bet your ass

yoshkar-ola, yotta-, yottabyte, yottahertz, you, you bet your ass, you better believe it, you can catch more flies with honey than with vinegar, you can lead a horse to water but you can't make it drink, you can lead a horse to water, but you can't make him drink., you can say that again