1. To partake in the event of LARP (Live Action Role Playing) with a donkey.
2. To attack, provoke, or molest a donkey or ass (in both senses) with a LARP weapon or other fake weapon, usually covered in foam.
3. Slang for penis. See fogigglystick.
"That would be hilarious to LARPADONKEY!"
"I'm gonna sneak up on that fine-ass bitch and give her a good ol' LARPADONKEY, mother fucka'!"
"The dude had a chode for a LARPADONKEY!"