The Collaborative International Dictionary of English v.0.48:

Punter \Punt"er\, n. [Cf. F. ponte. See Punt, v. t.]
   One who punts; specifically, one who plays against the banker
   or dealer, as in baccara and faro. --Hoyle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Punter \Punt"er\, n.
   One who punts a football; also, one who propels a punt.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Punter \Punt"er\, n. (London Stock Exchange)
   A scalper.
   [Webster 1913 Suppl.] Puntil

WordNet (r) 3.0 (2006):

punter
    n 1: someone who propels a boat with a pole
    2: (football) a person who kicks the football by dropping it
       from the hands and contacting it with the foot before it hits
       the ground
    3: someone who bets [syn: bettor, better, wagerer,
       punter]