That kid that nobody can stand. They yell at him and tell him to shut up, but he just doesn't get it. Also, he asks questions that make no damn sense.

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