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1510s, "to dance, frolic," from Middle English frisk "lively" (mid-15c.), from Middle French frisque "lively, brisk," from Old French frisque "fresh, new; merry, animated" (13c.), possibly from a Germanic source (cf. Middle Dutch vrisch "fresh," Old High German frisc "lively;" see fresh (adj.1)). Sense of "pat down in a search" first recorded 1781. Related: Frisked; frisking. As a noun from 1520s.
: They did a quick frisk and let him goverb