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Used in lifting weights originated from reddit.com:

You cannot criticize anyone's form unless you lift 90%+ of theirs.

The 90%+ extends to Wilks score to help normalize.
Good job - you can barely deadlift 200 and you are talking shit about someone who pulls 600. Rule 19.
by SoloX July 06, 2012
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Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

Susan: 'LEAVE BRITNEY ALONE!'
by Billy Chickenhole September 15, 2007
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3
A rule created in 1903 by Merrick Gjertson stating that there can only be one girl per internet.
Rule 19, one girl per internet.
by Neb Good May 02, 2007
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