A vulcan vagina clamp is derived from the Vulcan greeting whereby the right or left hand is raised so that the index/middle finger and the ring/little finger are spread, making the shap of a "V;" when put sideways, the two top fingers go into a humanoids vagina and the bottom two fingers (not the thumb) go into the humanoids ass. Similar to the two in the pink and one in the stink, except you put two fingers into the stink.

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