This is the (S)exual (Ex)ploitation Function (F(SEx) for short), where (ru/16) denotes the 'Constant of Consent'. The formula is read aloud as "Before I fork you, are you over 16, cutie pie?" and is carefully adhered to by anyone from pedophiles and child abusers, to hyper-sexual adolescents.
Girl: "Sir, I don't understand this math problem, what formula do I use to solve it?"
Teacher: "B4·I4Q·(ru/16)·Qtπ ....?"
Girl: "Umm...I don't get it?"
Teacher: "Come and see me after class, then I'll show you how to...do it."
An act that is sought out and done purely because a person has never done it before. Such acts are usually things the person has wanted to do for a long time. The urge to brag is a common side effect of doing a never b4.
Bronzin at a nude beach for the first time is a never b4.
An abbreviation used on messageboards like /b/ in anticipation of a certain image, event, or meme occuring.
"In b4 Togepi" = I am sure that any second now, a picture of Togepi will be posted to this thread.
"In b4 b&" = There is no doubt that someone is about to get the banhammer because of their churlish behavior.
"In b4 v&" = I am quite certain that the FBI will soon be showing up to take us all for a ride in the party van, and if such a thing happens, you can't say I didn't see it coming.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.