I know a slightly different version of it, with a chorus;

Mother, strike not little Buford
Mother, pound not on his head
Mother, strike not little Buford
Methinks you should stab him instead

(Chorus)
Stab him, stab him,
Methinks you should stab him instead, instead
Stab him, stab him
Methinks you should stab him instead

I have NO idea as to where this came from. It sounds almost straight out of a penny dreadful or somesuch, or almost like a football (English) chant, but there's something that doesn't quite ring true with that for me.

M