H.D. is a short fat bald man who does nothing but talks about his ancient yet insignifcant military career, and also who wants to fuck john cary in the ass. This person also has sexual relations with his cat named wanda.
H.D. if you look at shirley's ass one more time you ass is fired.
Anything But Homework Disorder. It is characterized by compulsive need to come up with things to do in order to avoid doing the school work. Many high school and college students suffer from this condition.
Guy:"I have the A.B.H.D."
Girl:"Oh..."
Guy:"Yes Anything But Homework Disorder. I hate that class."