"Fuck a goat ass"
I came up with this one at work one day. It's pretty much pure gold in my opinion. There is a subtle beauty within the phrase. If pronounced correctly it can be made to sound as though you are saying:
"have a good day"
pr0nounced: "effa-g'-day

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