huff a sharpie or to huff a sharpie means to fuck off. it was coined by some internet users and people, but the most famous example is in the song "we've got your back (documented minor emotional breakdown #2)" by indie pop band los campesinos!

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