It's simply another term for saying, 'Fuck it.' It is a French phrase that means 'for glory.' It can be used to peer pressure someone into chugging a beer, punching someone, talking to a girl, or virtually anything. Who doesn't want to do something 'for glory'? The best way to use it is to yell it before you do what you were pressured into. Example: (right before the beer chug) "POUR LA GLOOOOOIRE!!"

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