I bet

Doubt disguised sarcastically

I bet expresses confident agreement or acknowledgment—you're affirming that something is likely true or understandable: That must have been frustrating. / I bet.

It can also introduce a prediction or assumption: I bet she's already left.

The phrase carries casual certainty rather than literal wagering, though it retains the metaphor of being willing to stake something on the claim.

Related

stake · odds · sure · probably · certainly · sure thing · doubtless · suppose · think · hunch · chance · take a chance · risk · money · casino · poker · confident · likely

Opposites
certainty/belief expression

I betI doubt it

Expression of disbelief

no way · unlikely · doubtful · fat chance · not a chance

sincerity of agreement

I betyeah right

Sarcastic dismissal of claims

as if · oh really · if you say so · no really · I mean it

wagering/risk-taking

I betI fold

Abandon the hand

I pass · I'm out · count me out

Family

bet, bets, betted, betting, bettor, bettors

Familiarity
Top 10,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G