Great, fabulous, excellent. etc. From tacky 1980s Scottish kids comedy show The Krankies, in which a tiny woman pretended to be a schoolboy. Still widely used in the UK. Example: Pizza for dinner, Bob. Fandabbydozie, mum.
FANDABBYDOZIE
Meaning of FANDABBYDOZIE in English
Slang English vocab. Английский сленговый словарь. 2012