"Tiddlebits" refers to a phenomenon that occurs during that moment when you're in a left-turn lane and it's a green light, but cars are coming with JUST the right amount of space between them so as to be highly frustrating. Tiddlebits are the spaces between the vehicles.

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