The act of getting your balls sweaty, putting your balls on a girl's eyelids, and placing your dick on her nose, so it hangs over. She will then look like Gonzo from The Muppets.

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