penis of above average size, that is used as tool to awake sleeping/passed out male friends and in some cases family members. A donkus is usually known all too well by the group of friends that it is associated with. Despite it's bad reputation and over-exposure it is an important part of the group dynamic and always "up" for a good laugh.
"Dude the Donkus woke up P-Dizzle again, I think P-Dizzle is starting to like it."
by Muff Dawg May 03, 2006