Derived from shizzle

Fallon: or the smartest most fascinating person. someone who kicks ass in all. punctual; but only for those who arrive to work early and are seated at 7:45am.

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