an annoying little bastard that plans to take over the world

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

When an erect penis is put through the middle of a MacDonalds Breakfast Bagel and your partner eats it.

A full fat purple ronnie is the above, but with added cum on top (glazed).

An intelligent person who has devised a plan to eliminate the existance of all those around him that he dislikes