To fall, faulter, crash, topple or any other non-stellar action resulting in the breaking of ones neck without having permanent dissability, and hence: still able to be laughed at after the incident.
"Dude, be carefull on top of that scaffold. Your gunna fuckin slip and D-Ball on your head.;
When you cover/drown your balls in animal fat, then shove them into one of your friends/best friendsmum's mouth.
Joe: 'Guessing what Im doing at the weekend?'
Garry: 'What?'
Joe: 'Donkey balling your muma!'
Garry: 'Huh, thats funny, because I donkey ball'd your muma just week!'