The act of masturbation by taking a huge diarrhea dump, then wiping and chokin it with whatever is on the toilet paper. Most commonly done by lonely, homeless people, who have no lotion so it's hard for them to lube up.

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