referring to Amy Winehouse, it defines someone who whines about things when they are supremely talented and/or lucky.
For example, anyone with a drug problem is lucky to afford rehab, but Amy Winehouse just rejects it.
Amy: Wah! I can afford to go to rehab but I don't want to lose my street cred!
Agent: Quit being a whinehouse about it.
Describing someone as being a crack head.
OR being really super crazy.
Taken from Amy Whinehouse life as a crack smoker and doing weird things.
ME: "So I was walking home from work and some whinehouse was running naked through the street!!!"