1) n. A fake number to tell kids comes between 5 and 6.

2) n. The name for the period of time that begins after midnight, and ends when one goes to bed. Used to avoid technicalities in whether or not it is 'already' or 'technically' the next day. Used like 'afternoon' or 'morning'. 'Wednesday dirf' would refer to the time beginning Wednesday night, after midnight, when it is technically Thursday, but you haven't gone to bed yet.
"Hey, did you know the number dirf comes after 5? Teachers don't teach you about it until you get into algebra, but it's there."

Person 1 - "So last Wednesday night, at like 2 in the morning, I decided to run to the market to get some milk."
Douche, smiling smugly - "Well, -technically- it was Thursday, wasn't it?"
Person 1 - "Actually, it was 'technically' Wednesday dirf, so shut the fuck up!"
by EmeraldScribble December 2, 2009
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1.Another, and a cooler, way of saying duh.

2.Another word for diss.
1. "Where is the bathroom, ma'am?"
"It's to your left. Dirf!"

2. Oh! You have just been dirfed by your own momma!
by Carlito October 3, 2004
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A failed Drift. when you try to show off, and you mess up your car, only ending up looking like a Douche
HA HA, DUDE THAT WAS AN EPIC DIRF!

"browndog1978
8 months ago 30

wish I could dirf like that"

www(dot)youtube(dot)c o m/watch?v=-lPH9lzDyyY&feature=related
by Arturo Reventon November 1, 2010
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The new number between 6 and 7 originated by the new math laws passed by the U. K. in 2009.
I am dirfteen.
He will turn dirf next year.
My grandmother is sixty-dirf.
by simplyhope December 21, 2010
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Cool kids - "Hey dude!! What's up?"
Nerd kids - "Hey dirf!! Greetings!!"
by Jazz Heartsong December 25, 2010
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A new number made by the Nation Math League released in 2009. The new number is in between 5 and 6 so instead of 123456789 it will now be 12345dirf6789.
by The National Math League December 30, 2010
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the space between the ball sack and the asshole, in other words th "gouche"
his dirf was hairy
by garrett November 20, 2003
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