A sex position that involves the man standing up with the woman holding on to him with her legs wrapped around her, his penis in vagina and then the woman starts bouncing up and down or the man thrusts her up and down.

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