> Cutler’s people took work seriously, while Microsofties sometimes tossed nerf balls in the hallways or strummed guitars in their offices.
> The differences in style were apparent to Cutler’s people, who derisively referred to Microsoft as “Microslop.”
From “Showstopper!: The Breakneck Race to Create Windows NT and the Next Generation at Microsoft”. Seems like the term is fairly old.