a permanently erected cock
fast and furisous nights
rainbow parties
boys who feel them up
humps
small tushes, but large cocks
love songs
the notebook

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