doubt it

I'm not convinced

A skeptical response expressing disbelief or disagreement with what someone has said or suggested.

It functions as a conversational shorthand for "I doubt that's true" or "I don't think so": Think he'll show up on time? —Doubt it.

The phrase conveys casual dismissiveness without requiring elaboration.

Related

suspicious · nah · yeah right · sure · unconvinced · not buying it · hesitant · iffy · improbable · fat chance · mistrust · eyebrow · raised eyebrow · scoff · shrug · smirk · whatever · hard pass

Opposites
epistemic certainty

doubt itbet on it

Expression of certainty

positive · count on it · convinced · confident · absolutely

agreement/endorsement

doubt itI agree

Expression of assent

totally · exactly · absolutely · for sure · you bet

agreement/disagreement

doubt itagree

Hold the same view

you bet · totally · exactly · absolutely right · no question

Family

doubting

Familiarity
Top 20,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G