Verb: to Derf is to purposfully send someone the wrong way, or to trick someone into going the wrong way. You have to strike it with such confidence and not to stutter that they do not second guess you and still believe they are going the right way. Even when they know they have gone the wrong way, they blame or doubt themselves.
This guy asked me for directions and I totally derfed him.
by Joeseppe July 15, 2019
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a slang term for dry humping. Involves sexual contact through clothes
Did you get way derfing her last night.
by derfsurfer April 30, 2009
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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
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A number between 5 and 6. It was created by Carly from iCarly.
1: What is that new number T-Bo was talking about?
2: Oh yeah! That is derf.
by 2000s Kids Are Better April 09, 2018
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