Source : Webster's Revised Unabridged Dictionary (1913)

Fop \Fop\, n. [OE. foppe, fop, fool; cf. E. fob to cheat, G.
   foppen to make a fool of one, jeer, D. foppen.]
   One whose ambition it is to gain admiration by showy dress; a
   coxcomb; an inferior dandy.

Source : WordNet®

fop
     n : a man who is much concerned with his dress and appearance
         [syn: {dandy}, {dude}, {gallant}, {sheik}, {beau}, {swell},
          {fashion plate}, {clotheshorse}]