[1] : The Collaborative International Dictionary of English v.0.48

gull \gull\ gu^l, v. t. imp.  p. p. gulled gu^ld; p.
   pr.  vb. n. gulling. prob. fr. gull the bird; but cf.
   osw. gylla to deceive, d. kullen, and e. cullibility.
   to deceive; to cheat; to mislead; to trick; to defraud.
   1913 webster

         the rulgar, gulled into rebellion, armed. --dryden.
   1913 webster

         i'm not gulling him for the emperor's service.
                                                  --coleridge.
   1913 webster
see also:
gulled gulling 

[2] : The Collaborative International Dictionary of English v.0.48

gull \gull\, n.
   1. a cheating or cheat; trick; fraud. --shak.
      1913 webster

   2. one easily cheated; a dupe. --shak.
      1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

gull \gull\, n. of celtic origin; cf. corn. gullan, w. gwylan.
   zool.
   one of many species of long-winged sea birds of the genus
   larus and allied genera.
   1913 webster

   note: among the best known american species are the herring
         gull larus argentatus, the great black-backed gull
         l. murinus the laughing gull l. atricilla, and
         bonaparte's gull l. philadelphia. the common
         european gull is larus canus.
         1913 webster

   gull teaser zool., the jager; -- also applied to certain
      species of terns.
      1913 webster
see also:
larus larus argentatus l. murinus l. atricilla l. philadelphia larus canus 
gull teaser 

[4] : WordNet (r) 2.0

gull
     n 1: a person who is gullible and easy to take advantage of syn:
           chump, fool, mark, patsy, fall guy, sucker,
           soft touch, mug
     2: mostly white aquatic bird having long pointed wings and
        short legs syn: seagull, sea gull
     v 1: make a fool or dupe of syn: fool, befool
     2: fool or hoax; "the immigrant was duped because he trusted
        everyone"; "you can't fool me" syn: dupe, slang, befool,
         cod, fool, put on, take in, put one over, put
        one across
see also:
chump fool mark patsy fall guy sucker 
soft touch mug seagull sea gull befool 
dupe slang cod put on take in 
put one over put one across 

[5] : Moby Thesaurus II by Grady Ward, 1.0

119 moby thesaurus words for "gull":
   babe, bamboozle, beat, befool, beguile, beguile of, betray, bilk,
   bluff, boob, bunco, burn, cajole, cheat, cheat on, chicane, chisel,
   chouse, chouse out of, chump, cinch, circumvent, cog, cog the dice,
   con, conjure, cozen, credulous person, crib, cull, deceive,
   defraud, delude, diddle, do in, do out of, double-cross, dupe,
   easy mark, easy pickings, euchre, fall guy, finagle, fish, flam,
   fleece, flimflam, fob, fool, forestall, fudge, gammon, get around,
   gobe-mouches, gouge, greener, greenhorn, greeny, gudgeon, gyp,
   have, hoax, hocus, hocus-pocus, hoodwink, hornswaggle, humbug,
   infatuate, innocent, juggle, leadpipe cinch, let down, mock,
   monkey, mulct, outmaneuver, outreach, outsmart, outwit, overreach,
   pack the deal, patsy, pigeon, play one false, plaything,
   practice fraud upon, prize sap, pushover, put on,
   put something over, rook, sap, saphead, scam, schlemiel, screw,
   sell gold bricks, shave, shortchange, sitting duck, snow,
   stack the cards, stick, sting, stooge, string along, stultify,
   sucker, swindle, take a dive, take in, thimblerig, throw a fight,
   toy, trick, trusting soul, two-time, victim, victimize

Gull >> G Words
Gull, definition of term: Gull
gull_pag1.html

Sea Gull >> S Words
Sea Gull, definition of term: Sea Gull
sea+gull_pag1.html