Origin: 1350–1400; Middle English flekked spotted; akin to Old Norse flekkr spot, streak, Old High German flec (German Fleck), Middle Low German, Middle Dutch vlecken to soil
early 15c., from O.N. flekka "to spot," from P.Gmc. *flekk- (cf. M.Du. vlecke, O.H.G. flec, Ger. Fleck). Related: Flecked; flecking. The noun is first recorded 1590s, probably from the verb.