When a woman milkstamps someone and she is not wearing a bra or any brassiere like mammary restraint and she is not wearing a shirt or any torso covering clothing. I.e. a milkstamp from a completely topless, naked from the waist up, and bare chested, woman. It is considered the greatest of all milkstamps.

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