gull in WordNet English dictionary

1. 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 
   
2. make a fool or dupe of
   fool  gull  befool 
   

1. a person who is gullible and easy to take advantage of
   chump  fool  gull  mark  patsy  fall guy  sucker  soft touch  mug 
   
2. mostly white aquatic bird having long pointed wings and short legs
   gull  seagull  sea gull