1 definition by ICberg7

Top Definition
in dating, determines the lowest possible age you can (appropriately) find dates. In other words, it determines the lowest possible age before the "too young for you" category begins
Billy's 35 and really likes Jane, but she's only 23 and everybody says she's too young for him. She meets the half plus six rule, so Billy doesn't care.
by ICberg7 August 22, 2005

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