fluff

Noun

• a blunder (especially an actor's forgetting the lines)

• something of little value or significance

• any light downy material

Verb

• ruffle (one's hair) by combing the ends towards the scalp, for a full effect

• erect or fluff up
  • the bird ruffled its feathers
    

• make a mess of, destroy or ruin
  • I botched the dinner and we had to eat out
    
  • the pianist screwed up the difficult passage in the second movement
    

Related words

• Synonyms: 
  bagatelle , frippery , frivolity , tease , ruffle , botch , bodge , bumble , fumble , botch up , muff , blow , flub , screw up , ball up , spoil , muck up , bungle , bollix , bollix up , bollocks , bollocks up