Someone who is very versatile and skilled in the art of orally stimulating the male genitalia. A person who loves to eat penis. A person who performs fellatio very often and very well.
Someone (usually a female) who is both incredibly adept and experianced in the art of fellatio. To be a true Dome doctor, the sujbect in question must be so good at giving blow jobs that they might have gone through several years of college to earn a degree in the skill. Only the very bestcocksuckers get this coveted title.