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Someone who is a member of Alcoholics Anonymous AA and abstaines from the consumption of primarily alcohol and to some to abstain from any mind of mood altering substance including alcohol.

Origin: Bill W. the founder of Alcoholics Anonymous, in social settings this phrase was used to explain why one did not drink alcohol without explicitly stating one's membership in this group which values its anonymity.
Q: Would you like a glass of wine?
A: No thanks, I'm a friend of Bill's.
by dakdak900 October 20, 2013
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Archaic 1990s slang for a liberal celebrity with a personal connection to former President Bill and current Senator Hillary Clinton. Examples include Barbra Streisand, Carly Simon, and a good number of other well-known Hollywood types. Distinguished from true progressives by being largely a bunch of rich, connected limousine liberals.
by Brian X September 28, 2003
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