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1.
UDF
U Dumb Fuck. Usually pronouced kinda like (youdeaf), and is usually played by a joke by sayin UDF to another friend, making him think that you said something about him being deaf.
"I got the answer wrong" "Youdeaf?" "No i can hear" "No, youdeaf?" "I can hear man!" "UDF, u dumb fuck!"
by jun izumi March 16, 2010
 
2.
UDF
A poorly run company that attempts to be cool by using the same tired old puns in their advertising campaigns. Also a terrible choice for employment as all employees are treated like thieves and morons. Also known as United Dairy Farmers.
I worked at UDF until I realised everyone in charge is a dipshit.
by Dopey baby! April 21, 2005
 
3.
UDF
United Dairy Farmers, an ice cream/ convenience store. the only fucking thing in Terrace Park.
"man i'm so baked- let's head to UDF and pick up some munchies"
by lauren August 31, 2003
 
4.
UDF
uncircumsized dick fondling - giving a jew or any uncircumsized man a handjob
'So Bill I heard you did some hot and heavy UDF last night'
by jacksragdoll May 28, 2007
 
5.
UDF
United Dairy Farmers. (convinient store)
the place down the street from my church
hey guys! lets go to UDF and get a frap!
by saritasmile08 July 19, 2004
 
6.
udf
Under Dah Fence ( anyone or anything that goes under da fence)
Mud, water, cats, even Mexicans udf. In tijuana each day thousands of people udf. See mexican mudbutts, its been going on for 100 years.

Now canadians are udf, pockets full BC Bud cuming to America
by itichie_nocanpo July 03, 2006