Definition of pikers:
(n) :
A stingy person; a cheapskate.
(n) :
One who bets or gambles only with small amounts of money.
(n) :
An amateur.
(n) :
(Australia, New Zealand, slang) One who refuses to go out with friends, or leaves a party early; a spoilsport or "chicken".
(n) :
(Australia, New Zealand, slang) One who pikes (quits or backs out of a promise).
(n) :
A tramp; a vagrant.