derf

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 4, 2011

DEFFO

Short for definately.
Said in normal conversations.

"I'm defo keen to get fucked up."

by Diego August 30, 2003

Mo Deff

Most Definetley: a saying that means most definetley. use when you are drunk,stoned or on the verge of pukeing.

Guy1:hey dude you wanna go party?
Guy2:Mo Deff man! Mo Deff!

by Garrett Silva May 5, 2005

Deffinitism

The most Magical Way of Living, and only very few can obtain the skill to accomplish it.

Justin Vowels to live life in deffinitism , beacuse only awesome people can be even considered.

by CATHERINEWASHERE April 29, 2010

derpfiller

something filling in/and/or reapeating

we watched an anime series and 6 episodes were derpfiller..

by hankerszour November 21, 2010

Dorffed

When one promotes an alternative methodology claiming it to be safer, when in fact, it is actually 10 times more dangerous.

"Jenny McCarthy dorffed me into believing that by not vaccinating my children I would be preventing them from developing autism. Instead, my three year old died in agonizing pain from aseptic meningitis."

by bloodface November 29, 2014

Derfnig

It is an offensive term used to describe an Afrian-American.(Usually on drugs)

Man that derfnig was crazy last night.

by Word_Definer June 4, 2015