1. A term used to address a person (usually male) in place of a name.
Sometimes used in conjuction with Boo, as in Boo Radley.
However, has more to do with the word boo than the character (from To Kill a Mockingbird.)
2. An placeholder for a real name, given when anonymity is desired in an official or semi-official setting. One simply changes one of his names to Radley when, for example, an ugly girl asks your name and you need to make up something quick and you don't ever plan on seeing her again.
What's going on, Radley?
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