(historical) The doctrines, principles, or practices of the Know-Nothings.

(historical) A member of a secret antiforeigner political organization in the nineteenth-century United States.

plural of Know-Nothing

Alternative form of you know what

(Ireland, dated) God knows; nobody knows / (Ireland, dated) God knows; of course, certainly, nobody could doubt

Knowing of itself, or without the communication from another.

(also philosophy) Be aware of your own strengths and limitations.

(idiomatic) To have personal or social connections.

(UK, transitive) To have very thorough knowledge of.

Alternative form of God knows