A term of identification used for anoyone who can closely imitate the stunned demeanor that donkey kong takes when he receives a serious blow to the head. This shortened form is more easily said in conversation than "donkey kong". D.K. is just too cool to be considered for such a person. Also, it carries connotations of Shrek's sidekick.
Josh Good is donkey. Call him that when you see him on Lycoming Campus and elsewhere.