gull1
  
  n.
 a long-winged, web-footed seabird typically having white plumage with a grey or black mantle. 
[Family Laridae: many species.]
 
  Etymology
  ME: of Celtic origin; rel. to Welsh gwylan and Breton gwelan.
 
  
    
gull2
  
  v.
 fool or deceive (someone).
n.
 a person who is fooled or deceived.
 
  Etymology
  C16: of unknown origin.