This is a term used for when the girl has the nasty, rotten, dirty, blistery, gunky, tilted sided, moldy bumps with the yellow gunk oozin' out the tip of the fresh cut blistery bumps until the pouch erupts leading to crusty bumps, so crusty and dirty that the whole sack explods and bursts with fluids shooting out like a fire hydrant out her tilted orgasm.

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