when a girl is such a big slut that she needs to feel tight latex around her skin and tits she lies in a vacum bed, vacums all the air out and feels the latex against her tits. Usually another person rubs her eroticly.

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