Question: where does the saying knock down ginger come from

title: Knock, Knock, Ginger
text: ( hide ) This article has multiple issues . Please help improve it or discuss these issues on the talk page . ( Learn how and when to remove these template messages ) This article possibly contains original research . Please improve it by verifying the claims made and adding inline citations . Statements consisting only of original research should be removed . ( June 2014 ) ( Learn how and when to remove this template message ) This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . ( November 2008 ) ( Learn how and when to remove this template message ) ( Learn how and when to remove this template message )