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

An odd looking hemisphere that coaches use to do disturbing exercises

Bosus is a word invented by a cripple with a rocket wheel chair that can't pronounce bogus

I, Lewis A.C. invented this word on the 18/11/2020 and I'm still thinking of a way to use it properly.

a bosu is someone who is cooler than your best friend