The Know-it-all (n.) doesn't know enough to conceal what he doesn't know.
A Know-it-all (n.) knows everything, except how to keep others from thinking him a fool.
A Know-it-all (n.) knows more about everything than you know about anything.
A Know-it-all (n.) knows the answer even before he understands the question.
A Know-it-all (n.) seldom meets his intellectual equal, and never his superior.
A Know-it-all (n.) never opens his mouth without subtracting from the sum of human knowledge.
A Know-it-all (n.) is a man whose wide range of information is always bas'ed on a narrow acquaintance with facts.
A Know-it-all (n.) is always obnoxious, especially when he's right.
A Know-it-all (n.) is always recognized by his ability to explain everything.
A Know-it-all (n.) always seems to have the solution to every problem right in the hollow of his head.
A Know-it-all (n.) can talk on all branches of knowledge like an encyclopedia- without ever opening one.
A Know-it-all (n.) knows everything except one thing: he doesn't know how much he doesn't know.
A Know-it-all (n.) knows how to do everything, but somehow never does.