Mariah Carey -- Loopy And Aggressive ... I Terrorize Nannies

Mariah Carey says she has no idea where her husband is half the time ... but she knows where most of her nannies are -- the unemployment line.

A champagne-sipping Mariah stumbled through a bizarre radio interview Wednesday, making it sound like her marriage to Nick Cannon is loose as a goose.

She also explains why she fires her nannies all the time ... think Hand that Rocks the Cradle.