What is the meaning of fluff?

noun

• Any light downy material.
• Something of little value or significance.
  • synonyms: bagatelle, frippery, frivolity
• A blunder (especially an actor's forgetting the lines. )

verb

• Make a mess of, destroy or ruin.
  • usage: "I botched the dinner and we had to eat out"; "the pianist screwed up the difficult passage in the second movement"
  • synonyms: botch, bodge, bumble, fumble, botch up, muff, blow, flub, screw up, ball up, spoil, muck up, bungle, bollix, bollix up, bollocks, bollocks up, bobble, mishandle, louse up, foul up, mess up, fuck up
• Erect or fluff up.
  • usage: "the bird ruffled its feathers"
  • synonyms: ruffle
• Ruffle (one's hair) by combing the ends towards the scalp, for a full effect.
  • synonyms: tease