Alternative form of know B from a battledore

(archaic, often in the negative) To know anything at all; to have the most basic common sense or intelligence.

To be confused about how to handle a situation.

(idiomatic) To possess confidential and incriminating information about a person's or organization's misdeeds or other secrets.

(colloquial) you have chosen the wrong person / (colloquial, literally) you are good at picking people or things

A rhetorical question asked to show that the person asking it neither knows the answer nor would be able to know it.

Used to add annoyed emphasis to an associated statement.

Alternative form of know one's own mind

Used to show a relevant fact that is unknown to a person, or that the result or sequence of events differs greatly from what one had expected with the little knowledge he or she had about the situation beforehand.

One will demand or expect justification; used in threats.