A phrase commonly used by the gymcel, incel, and gigachad. Because a Sigma Male is equal to an Alpha Male, and the Sigma sits outside the socio sexual hierarchy, he is free from the relationships and burdens that come from being the top of the pack. It is for this reason that fellow Sigma Males will use, "Stay Sigma" as a greeting, compliment, etc.

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