What does MUTU mean?

It comes from ‘Mummy Tummy’. You say "MooToo", not "MuhTuh".

If you’re a Mum or Mummy or any other word for describing any woman who has birthed a child in any way, and you have a midsection you’re not happy with, then yes, MUTU is for you.

EDITS TO MAKE: change links to be UK site.