half your age plus seven

A totally idiotic and anti-Erotic (with reference to the god of love himself) dividing-line, whereby one may not make a Romantic/erotic/sexual move toward someone who is not at least half one's age, plus seven more years. (Or as non-terrans sometimes say in SF stories, "seven of your years," as though to make the point about the relativity of it all,)
Phaedrus: That gladiator-in-training over there sure has the moves, n'est-ce pas?

Xanthias: Shame on you! He is only 19 years of age, and your are 26! Don't you understand that the "half your age plus seven" rule is the will of the gods?!

Phaedrus: Right, tell Aphrodite that, after she pounced on that cute Trojan cowboy Anchises; tell Zeus that, after he swept away that other cute Trojan, Ganymede.
by Caniscandida September 12, 2009
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There's 1300 reviews on this phrase, and no one has managed to figure out the reverse of this rule? Surely my town wasn't the brightest of the lot?

If you're 40, 27 and younger is skezy, as 40/2+7 = 27.
If you're 40, 53 and older is skezy, as 40*3/2-7 = 53.
No one here seems to know how to write a formula. Half-your-age-plus-seven
by ep1032 October 16, 2010
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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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