Jewish dropout: a boy who didn’t get his Ph.D. — ANON - Leo Rosten

The braggadocio aspect is important: a successful but modest man is ordinarily not called a k’nocker. A k’nocker is someone who works crossword puzzles — with a pen (especially if someone is watching).

Tis said that Hitler, disturbed by nightmares, called in a soothsayer. The seer consulted a crystal ball and said, “Ah, mighty Führer, it is foretold that you will die on a Jewish holiday.” “Which one?” said Hitler with a scowl. “Any day you die will be a Jewish holiday.” Simchas

First-rate people hire first-rate people; second-rate people hire third-rate people.