An insufferable know it all的中文怎么说？ An insufferable know it all的中文怎么说？Sorry this is a very native expression, let me explain what it means. A know it all- A person who thinks and acts like they know everything about everything. Insufferable-Adjective-Too extreme to bear; intolerable.2：Having or showing unbearable arrogance or conceit Example sentences: "Are you incapable of restraining yourself, or do you take pride in being an insufferable know-it-all. Dear insufferable know-it-all, Unless your name is God, Google or Hermione, you, in fact, do not know it all. Sincerely, good day.