Ytmnd's "Not Safe For Work" section. It's sort of the dark side of YTMND, with vasts amounts of mature content.
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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

Type of YTMND who are rated Not safe for work, witch mean that they are "18 or older" (altrough most ytmnd-er are below 14 (i'm not bicthing, it's a fact!))