know knothing

To know knothing is to misspell 'know nothing', so it means the same thing as to 'know nothing'.

It is rumored to have originated in a Twitter conversation by MiriIsACat in 2014.

Girl: "You know knothing"
Guy: "Know knothing, KNOTHING. NEVER FORGET. #KNOWKNOTHING2014"

by John W.W. February 28, 2014