noun

dude

An informal word for a man or a person being addressed.

The dude behind the counter always remembers my order.

Etymology

Dude first referred to a conspicuously fashionable man, then broadened into a familiar term for a man or a person being addressed. Its ultimate origin is uncertain.

More examples

Dude, your phone is ringing.
A few dudes from work join us for lunch.
I know that dude from my neighborhood.

Forms

dude · dudes

Similar words

guy: Usually refers to a man rather than addressing someone directly.
buddy: Often addresses someone familiarly rather than identifying a man.