This is an example of an eponym. It is also rhyming slang - Mae West = Vest

Mae West [mā' wĕst'] – “a type of inflatable life jacket.” Named for buxom U.S. film star Mae West (1892-1980).

http://www.dailywritingtips.com/30-words-inspired-by-29-people-and-an-elephant/


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