That wild, frenetic coupling that results in crashing off the bed, knocking over lamps, breaking apart furniture, and smashing into walls before collapsing in a sweaty, quivering heap.

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