deffo jeffo

an longer version of definitely, usually to a person to person with a name like jefferson or geoff.

person 1.we should defo go to the the rave
person 2.yeah deffo jeffo

by work colleague April 19, 2011

deffie

Urbandictionary slang for "definition." When one integrates a tasty word into his/her vocabulary or wonders what one could be, one might look up the deffie on urbandictionary.com

Hey loser, whats the deffie of "douchebag?"

by M ! T c H May 13, 2005

deffy

To make an emberassment of oneself. To fail at suicide in an attempt of gaining attention.

Deffy slit his wrists like a little school girl.

by Anonymous October 2, 2003

deffed

take a shit, defecation

john deffed, but it was a bad dung

by michael foolsley November 24, 2009

deffinfuckinly

fucking definitly.
syn:very definate

i was deffinfuckinly throwed friday, i woke up in sammys backyard in the fetal position.

by Juju Julianabean December 9, 2008

Defflicted

Messed up, broken.

The table was now defflicted, because a leg broke off.

by Sydney_austrailia August 3, 2011

defficacious

Adjective: Successful in producing a shitty results; ineffective.

Contrast with "efficacious".

The medicine was defficacious; My cough only worsened after taking it.

His defficacious work resulted in extended work hours for all his co-workers.

by efficacious_eruditer October 20, 2012