When a particular woman exhibits the appearence and properties of major bitchitude, such that pierces the soul to the point which all men fear her. She seems to be the type to not take any shit from anyone and most certainly slaps around any man whom she may copulate with.

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

When a girl is extremely prude and no guy is able to get with her, she is said to have an "Iron Vagina." Hence the name, the vag is impermeable to any male body parts (i.e. dick, fingers, etc.)and acts as if there is a extremely thick sheet of iron covering it, warding off any and all brave, unwanted invaders.