mop·sy noun ormop·sey\ˈmäpsē\ (pluralmopsiesormopseys) Etymology: obsolete English mop child, fool + -sy — more at moppet 1.obsolete: a pretty child : darling, sweetheart — used as a term of endearment or deprecation 2.[influenced in meaning by mop (I) ]archaic: a slovenly woman : slattern