What is a karma cheat on ninja warz

There aren't really any. From time to time, the app will award you free karma and there are plenty of karma relics that will generate free karma while equipped. Programs promising karma hacks/cheats usually don't work and/or compromise your facebook account by sending your password/etc. to the program's creator for him/her to exploit. Equipping karma relics and then just ignoring the app for weeks/months will allow you to stock up substantial amounts of karma.