A teacher who doesn't know what the HELL he/she is talking about. Makes the students do all the work (aka busy work) since he/she is fucking clueless about the entire field of study.
However, even though he/she cannot teach, he/she is a wonderful person. Super nice.
Person 1: "Our teacher can't teach at ALL!!!"
Person 2: "Yeah, but she is sooo nice. She even helped me fix my flat tire!!!"
Person 1: "Hmmmm...terrible teacher but wonderful lady...she must be a dr eddie!"