gyp also gip 
(jĭp) Offensive Slang
(jĭp) Offensive Slang tr.v. gypped, gyp·ping, gyps also gipped or gip·ping or gips
To deprive (another) of something by fraud; cheat or swindle.
n.
1. A fraud or swindle.
2. One who defrauds; a swindler.
[Probably short for GYPSY (from prejudiced popular perceptions of the Romani people as thieves and petty swindlers).]
gypper n.