Nothing.

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

Urban Slang derived from the word nothing.

a lack of muffins

What you get when you're finished with a muffin; the absence of a muffin

Slang for the word "nothing".

An enjoyable absence of worry or responsibility. An amiable response to injustice.