1) The sound made by a cat when vocalizing what is somewhere between a purr and a meow.

2) Can be used by humans to respond to questions where the person being asked is unwilling or not knowledgeable enough to answer.

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