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23.
The process of: executing a handstand; masturbating during handstand; ejaculating in direction of mouth; regaining post orgasm senses and gracefully avoiding free-falling wad. A professional sport in parts of Oregon.
Did you hear Sunshine Bear died while in the derf last night?

No…how?

His dad caught him in the act and beat him to death.
by Lupus Lavign. July 12, 2006
144 164
 
1.
The face a dog makes when he or she tilts his or her head and looks inquisitive or confused.
I threw the ball and Rover just looked at me like, "derf"?
by smrtpnts December 04, 2011
67 49
 
2.
a slang term for dry humping. Involves sexual contact through clothes
Did you get way derfing her last night.
by derfsurfer April 30, 2009
219 201
 
3.
A new number that will be made globalized and reprinted into every dictionary, schoolbook, printed onto every calculator, and everywhere else that contains numbers, as of June 27th 2063. It is between 5 and 6 and is a combination fo both. It has the top of a 5 and the bottom of a six.
One, two, three, four, five, derf, six ...
by mizzlefftie012 July 15, 2011
66 52
 
4.
Noun:
Someone who is an idiot, annoying person, jerk, etc.

Verb:
The act of doing something stupid, lame or annoying.

Adjective:
Something that is rather lame, tedious, annoying, uncool, bad, etc.
Schmitty: That Shane guy is such a derf.
Joe: Yeah, he really derfed up that photo.
Cameron: It was such a derfy thing to do.
Brodie: Derfalicious indeed.
by camblyth June 20, 2011
86 76
 
5.
1. To get a stamp on your completed homework.
2. To act crazy and/or insane while teaching or just talking in general.
3. To yell at one's smart board.
4. To flick off one's class.

5. To stand on a desk to feel if the air is working.
6. To teach "shit"
7. To throw markers at ghetto kids.
Person A: "Yes I derfed my homework!"
Person B: "Ugh, lucky, I skipped one problem."

Teacher: "You guys forgot your calculators?!!!!" "YOU'RE ALL LOSERS!!!!!!"

Teacher: (to smart board) "WHY ISN'T THIS THING WORKING?!"

Students: (to teacher): "Happy Birthday!"
Teacher: *flicks off class and walks out*
by calculusstudent November 23, 2012
13 8
 
6.
fred, spelled backwards
yo derf, did you do your homework?
by sakawakag May 06, 2010
48 43
 
7.
the act of gettin fucked up, or describing that someone is fucked up or got fucked up
im tryna to get derfed tonight

did u see that nigga fall? he got derfed.

damn u lost 10-0, you got derfed
by DerfyMcDerf April 21, 2009
81 78