pock-mark (n.)

also pockmark, "scar or pit left by a pustule," especially from smallpox, 1670s, from pock (n.) + mark (n.). As a verb from 1756. Related: Pockmarked; pock-marked "pitted or marked with smallpox or pits resembling those left by it (1756); earlier was pokbrokyn (mid-15c.).