Some unnecessary monthly payment from Medicaid or S.S.I. which is made purportedly for a disability suffered by the payee. Crazy checks usually go to people already receiving other public assistance checks who have become adept at milking the system for more.
Alarmingly, crazy checks are often approved for simple and common conditions such as a child (usually in a single-parent household) who can't behave in school.
Suprisingly, money from the crazy checks is rarely actually spent on anything associated with treatment of the supposed disability.
"If my son does bad enough on that standardized test at school, I might be able to get another Crazy Check!! Glory Hallelujah!!"