Sefton’s Law states that the likelihood of mainstream adoption of new innovations is inversely proportionate to the extent to which using said innovation makes the user look like a dick.

Coined by Adam Sefton, Executive Creative Director at Reading Room

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