An insult used to degrade the subject; it is someone who is annoying, and not willing to do things a normal person would do, or the person using the term would do.
When asked if one would like to go out to breakfast in the morning the subject replied "i cant i have to go to class." The degrader shouted "Fuck man you a dorknigga!"
A dirtdigger is a person who digs dirt in another person's (man or woman) rectum. In other words, if you see pictures of somebody with his or her arm dug deep into another person's rectum; that's a dirtdigger.
Can also be used as a verb. "Dirtdigging"
"Hey, do you know that guy John?"
"-Yeah, he's a dirtdigger, isn't he?"