Top Definition
A rule the specifies the youngest person that a person of either sex can date without it being inappropriate. The rule is always calculated by the older person's age.
Kristi: I got asked out today by a guy who's 30.

Jason: Well, you are 22 so it fits the half-plus-seven rule...
by Dedao do pe September 23, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×