The rule (invented by wise men but which should also be adopted by wise women) which states that half your age plus seven is the youngest acceptable age of a potential romantic partner. (Does not work inverted.)
Example: "C'mon, man, she's legal!"
"She's 19; you're 26. Just because she's not jailbait anymore doesn't mean you should date the girl. Don't you know the Age Rule?"
Number Example: 26/2=13. 13+7=20.
by UnashamedBitch May 4, 2012
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A convenient rule to define the youngest that a romantic interest can be before the relationship is indecent. Widely referred to and used, the rule has merit for usefulness. The full version states: "if you halve your years then add seven, you'll have the youngest decent age for a partner; if you double your years then subtract seven, you'll have the oldest decent age for a partner".
However it's somewhat flawed thanks to the poor mathematical ability of its authors -- it gives a different result depending on whether it is worked out for a younger or older partner.
26-year-old Barbara waited patiently until Jack turned 20, fulfilling the half-your-age-plus-seven rule, before pursuing him romantically.
by kriswa July 28, 2007
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A mathematical equation used to find the youngest age a person can date without being considered a disgusting, cradle robbing freak. (A/2)-7=Y, where A is your age and Y is the youngest you should date.

Conversely the rule can be inverted to find the oldest age a person should date. 2(A-7)=O, where A is your age and O is the oldest you should date.
John is 26 and dating a 20 year old named Kate, (26/2)+7=20. Their relationship satisfies the half your age plus 7 rule.

Kate is 20 and dating a 26 year old named John. 2(20-7)=26. This relationships satisfies the inverse of the half your age plus seven rule.
by Trojan91 July 18, 2012
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