noun

mug

A foolish or easily deceived person.

He feels like a mug whenever he trusts those fake reviews.

Etymology

The slang word for a face extended to a person, then to someone regarded as foolish or easily duped. The negative judgment belongs to that later personal sense.

More examples

The con artist looks for mugs who will hand over cash.
Don't be a mug and pay to collect a supposedly free prize.
They take her for a mug, but she spots the trick.

Forms

mug · mugs

Similar words

fool: Emphasizes poor judgment rather than vulnerability to deception.
dupe: Usually identifies someone actually deceived, not merely easy to deceive.
sucker: A more common American slang term for an easy target.