The female version of 'rock out with your cock out'. However, refers to relaxing at home with nothing on the lower part of your body, usually watching television/films or playing video games and eating junk.

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy