I grew up in Peterborough (which is not in the North or the South but the East - so there!) we said "whim wham for a duck's arse".

We also had this word for sweets (what Mancunians call 'toffees' and Southern jessies call 'boiled sugar comestibles' - probably) and that was 'dods' - as in "gis a dod, mate or I'll bash yer 'ed in!". Has anyone heard that one before? I believe that in some regional dialects the word 'dod' means 'snail' - which sort of makes sense, in a revolting sort of a way.