It means everything from completely rediculous to absolutely amazing to just plain unexplainable to way too explainable
Omg, did you see the pictures from the party posted online? They were totally radonk
by September Hollace April 11, 2007
When an individual is fadonked in the ear, he has been radonked.
I radonked noam in the ear.
by Hebrew Hammer November 23, 2004