You're right. According to the 2nd definition in this dictionary, it's a dialect word from the North of England with the meaning you gave. I'd never heard it before.
What I meant was that "Mither" is a Scots or Doric word for "Mother", Fifers and Aberdonians call their Mother "Mither" or "Maither".
Ach it's some weird North Eastern dialect used by Teuchters. http://en.wikipedia.org/wiki/Doric_dialect_%28Scotland%29
In 2006 an Aberdeen hotel decided to use a Doric voice for their lift. Phrases said by the lift include "Gyaun Up" ɡʲɑːn ʌp (Going up), "Gyaun Doun" ɡʲɑːn dun (Going down), "atween fleers een an fower" əˈtwin fliːrz in ən ˈfʌur (between floors one and four).[9]
You'd never catch an Aberdonian actually paying for a hotel room either, all they want is sheep and board.