A girl with a very sexy body but an unattractive face... This phrase is generally uttered by men who examine the posterior of a lady as they drive by, On the approach they say "Oooohhh" and if her face does not match the beauty of her posterior as they pass they will say "Naaaaaa", hence Una.
Tha' wan is the town bike.
That woman over there that we know has such a filthy mouth for suckin on her that she could very possible such a lemon through a narrow pipe.