Archaic phrase used by African American slaves since the 17th century. A corruption of 'For
shine his hall, my knees ill' it was used as a greeting by slaves who had to
polish the floors of colonial mansions. Later became an
unrelated greeting.
'Missie, missie - yo massah done made me
polish dat whole corridor, an it done made my knees
hurt terrible - fo' shizzle ma
nizzle, an no mistake!' from 'Gone With The Wind' by Margaret Mitchell.