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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 02, 2009
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2
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 20, 2010
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3
Cool kids - "Hey dude!! What's up?"
Nerd kids - "Hey dirf!! Greetings!!"
by Jazz Heartsong December 24, 2010
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4
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 02, 2004
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5
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.
12345 dirf 6789
by The National Math League December 29, 2009
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6
the space between the ball sack and the asshole, in other words th "gouche"
his dirf was hairy
by garrett November 19, 2003
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The vengeful act of crapping on a lover's chest while they sleep.

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7
When one attempts to 'drift'. The subject has such lack of skill causing them to 'dirf' their automobile into a curb.
br0 i d1d a mAD DIRF int0 THe KuRB G!
by ...alex September 26, 2008
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The vengeful act of crapping on a lover's chest while they sleep.

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