fool in WordNet English dictionary

1. indulge in horseplay
   "Enough horsing around--let's get back to work!"; "The bored children were fooling about"
   horse around  arse around  fool around  fool 
   
2. fool or hoax
   "The immigrant was duped because he trusted everyone"; "You can't fool me!"
   gull  dupe  slang  befool  cod  fool  put on  take in  put one over  put one across 
   
3. make a fool or dupe of
   fool  gull  befool 
   
4. spend frivolously and unwisely
   "Fritter away one's inheritance"
   fritter  frivol away  dissipate  shoot  fritter away  fool  fool away 
   

1. a person who is gullible and easy to take advantage of
   chump  fool  gull  mark  patsy  fall guy  sucker  soft touch  mug 
   
2. a person who lacks good judgment
   fool  sap  saphead  muggins  tomfool 
   
3. a professional clown employed to entertain a king or nobleman in the Middle Ages
   jester  fool  motley fool