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2.
1. extremely difficult or challenging
The AP calc test today was really diff.
by 5'1"Racer February 12, 2005
 
1.
The "diff" is a new stat that has been added to every NBA scoreboard. Because there too many stupid black fans ( a few white ones too) who can not add or subtract quickly in their heads.
Stupid black fan: 'cuse me, let me ax you dis, how much is we winning by?

Smart white fan: look at the "diff" on the scoreboard, the "diff" was added for stupid fans like you!

Stupid black fan: otay
by whitey from cuyahoga hts November 28, 2010
 
3.
Short for differential when talking mostly about trucks and 4x4's
"Yeah I got an ARB locking diff in the front and a detroit locker in the rear"
by Moto May 20, 2006
 
4.
To do a Diff is to power level a character on an MMORPG from the bottom to the top level available in record amount of playing time. MOST who do this, have intentions of their account going to a Ni Hao website (Ni Hao = gold farmer)
(Lumathus):Man where did all our tanks go? they all went to healing spec! argh!
(Unregistered): hmm maybe I should do a diff with my druid so we have a tank in guild eh.
by Anticleia February 07, 2010
 
5.
a nice way to say fucker
You’re a diff.
by bread infection December 07, 2009
 
6.
an unselective and microscopically thorough comparison between two versions of something; comes from the Unix "diff" utility, which gives a list of all the differences between two files.
"First up I'm going to diff the technological advances of the two cultures."
by master_gopher January 16, 2006
 
7.
n. An abbreviation of "different"
As Digitus and the Asian girl are IMing...
Digitus asked, "Hey, u wanna go to the movies?"
The Asian girl replied, "No, let's do something diff. Let's go into a forest."
Digitus asked, "Why? Do you wanna do it? Cuz I do."
The Asian girl replied, "Yeah, let's go to the one over by the ice cream place and bring a condom, ok?"
Digitus replied, "Yeah, I got it. See ya."
The Asian girl said good-bye as they logged off.
by Digitus August 13, 2005