These definitions are known to me through my grandfather who left Scotland in the 1950s.
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A wee beastie is a small animal. A tiny wee beastie is a very small animal or an insect.
A bonny day is a beautiful day. A bonny child is good or good-looking.
big, strong, fine
A braw fine lad is someone you would want to chat up.
didn't, did not
isn't, is not
boy or young man
girl or young woman
May be used in conjunction with "tiny" to indicate extreme smallness or youth, i.e., "a tiny wee lad" is a very young boy.
Ducktionary (Translates Australian into American)
Chatspeak (Pre-txtspk but still good for a giggle)