The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fop
    n 1: a man who is much concerned with his dress and appearance
         [syn: dandy, dude, fop, gallant, sheik, beau,
         swell, fashion plate, clotheshorse]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "fop":
   Beau Brummel, arbiter of fashion, beau, blade, blood, boulevardier,
   buck, clotheshorse, clubman, clubwoman, coxcomb, dandy, deb,
   debutante, dude, exquisite, fashion plate, fashionable,
   fine gentleman, fribble, gallant, jack-a-dandy, jackanapes,
   lady-killer, lounge lizard, macaroni, man-about-town, masher,
   mondain, mondaine, puppy, socialite, spark, sport, subdeb,
   subdebutante, swell, swinger, taste-maker, tone-setter,
   trend-setter



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

FOP
       Feature Orientated Programming


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

FOP
       Formatting Object Processor (Apache, XSL-FO)