My Grandma B:
Fida, ishta, or uffda - I'm not sure about the spellings - I THINK they basically meant "I stepped in something I didn't mean to" or "That took me by unpleasant surprise" or "That smells really bad"
For whatever reason, she seemed to mind when the cat was laundering his/her bottom, and she would always push the cat over with one of the above words accompanying the action.