means A streak is an unbroken run of the same thing—a line, a stretch of luck, or a sequence of consecutive days or wins—or, as a verb, to move very fast or to run naked through a public place.

from From Old English 'strica,' a stroke or line, kin to 'strike' and to the German 'Strich.' The original sense was a mark drawn or smeared across a surface—a streak of paint, a streak of light—which stretched naturally into the idea of an unbroken run. The 'run naked' meaning is a 1970s American flourish, leaning on the older verb sense of moving with sudden speed, as if one were a streak across the eye.