DaveO -
Rank Bajin was one of Scottish cartoonist Bud Neill's main characters, See Wikipedia article
here
The name derives from a descriptive phrase "rank bad yin" that might be applied to one of Glasgow's nastier elements

rank:- awful, terrible, sometimes used as an emphatic, ie "very"
bad:- bad
yin:- one

I would guess that anyone giving a greyhound a name like that would not be having great expectations - or perhaps that was a ploy to throw the betting fraternity off the scent?

Ross