derf 

Synonymous with a skilled ninja. Often used to describe a quick and fierce enemy who is extremely agile and deadly.

Person #1: There's that girl Sarah, lets go beat er' up.
Person #2: Fuck that! She's a derf! Im leaving her alone.

derf by Slimescree January 7, 2008

Derf 

Derf is a very powerful inter-dimensional entity that presides over all things pertaining to video games, technology, and the universal force of awesomeness. Though this is all that he is responsible for, he is still omnipotent and omniscient though usually lets its followers find their own way as long as they stay on the lighter side of morally gray. He speaks in 133t speak and internet slang, has many different personalities (one for each video game genre), and, if you do right by him in life, he will elevate you to the Emerald Arcade, where you will live among the most advanced technology, awesomest games, and a lot of other things. Hey I don't know it was a short conversation.

Dude 1: Man for a while there EA was pretty bad with their games.
Dude 2: I know I wonder why?
(burst of pixels, Derf appears)
Derf: I know I let them come under the influence of the Great Spectator for awhile.
Dude 1 & 2: Let us worship you!

Derf by Derf's Prophet September 22, 2009

derf 

a unite of measure that measures derfs

one derf is the equivalent of one derf

derf by lookandlineage December 31, 2020

derf 

it means when your parents are fornicating and you walk in on them then join in

Rodney was caught derfing (verb) and sent to jail where he derfed (verb) again

derf by Rodney's sock May 11, 2022

Derf 

The act of Premarital dry humping. This occurs during the courting period for the LDS religion.
Hey baby girl, lemme Derf

“Jake it’s spelled derf”
“Actually there is two spellings for the word”

Derf by durfpatroller45 May 25, 2023

Derf 

A person of extremely high and incomprehensible intelligence. A genius of monumental and baffling proportions.

I wish I was just a derf. Then I would know the answers to all the questions in life.

Derf by binchaser October 20, 2008

derf 

Synonym for taint. The space between the balls and the asshole

"She licked my derf"

derf by Greg T January 29, 2005