A bed compiled of a matress, duvet and pillow. The bed is sat on more than it is slept in - theoretically used for sofa activities such as watching television or playing a video games console and occasionally slept on as well as other past times.
This definition was founded by Lex.
Girl 1: "Lex's bed is a Dumofa - it's a bed, but it's hardly slept in; just sat on and we talk and watch T.V. - like a sofa, but with a matress, duvet and a pillow."
Girl 2: "That sounds boring."
Girl 1: "It's not, I'm sure you've done something in a bed that we've done on his Dumofa..."