a.) A delusional person who thinks their investment choices MUST succeed because of past performance. They are so sure in their blind hope that they're willing to swear they'll eat their dick if they're wrong.
b.) Idiot
John McAfee was so sure of his idiot plan he swore to eat his dick over it. Dick eater goes Nom nom nom, nom nom.
A insult used to describe someone who excessively imitates or supports someone else, often to an annoying or embarrassing degree. This usually implies desperation or a lack of self-respect.
"Every time the manager walks in, Enon's right there laughing at jokes that aren't evenfunny. Total dick eater behavior."