1 definition by Mr11

Top Definition
The shortest form of the hugely popular expression "Laughing Out Loud". The evolution from "Laughing Out Loud" to the expression "5" is as shown here:

1. Laughing Out Loud - (Original)
2. lol - (Original -> Acronym)
3. 101 - (Acronym -> 1337 Acronym)
4. 5 - (Binary -> Decimal)

By using "5" instead of "lol", 1337 typists save 66% of their time, thus the need for the expression "5".

Typically a situation that warrants a "5" is funnier than a situation in which "lol" will suffice.
Adam: I think the person in the cube next to me just turded their seat.

Danny: 5!
by Mr11 June 08, 2007

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