When someone is regular but shag-able, he or she is referred to as shagular. While contradicting, this is usually resolved by being properly intoxicated.

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

Shagular is the name of someone who thinks he is a bad ass with a big dick, but he really isnt.