Cynic

a. [Gr. κυνικός, dog-like, from κύων, dog.] 1. Having the qualities of a surly dog; snarling; captious; surly; currish; austere. “Cynical content in dirt and beggary.” Berkeley.

I hope it is no very cynical asperity not to confess obligations where no benefit has been received. Johnson.

2Sense 2. Pertaining to the dog-star; as, cynic year; cynic cycle.

3Sense 3. Belonging to the sect of philosophers called cynics; having the qualities of a cynic; resembling the doctrines of the cynics.

n. 1. One of a sect or school of philosophers founded by Antisthenes, and of whom Diogenes was a disciple, so named from their morose and contemptuous views and tenets.

2Sense 2. One who holds views resembling those of the cynics; a morose or contemptuous person; a snarler; a misanthrope.

He could obtain from one morose cynic, whose opinion it was impossible to despise, scarcely any not adulated with scorn. Macaulay.