A description for the presence of too many men and not enough women, "tube station" draws from a play on words of the European transit system. Analogous to "sausage fest."

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