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

deffocate

To die a slow and painful death in your own filth

I will Deffocate my enemies

by Mr DeffocateYou October 29, 2013

Deffiantly

How stupid people spell "definitely"

"Everyone should deffiantly come to my house party tomorrow"

by Johnny Longstory July 13, 2014

Deffanie

Ugly stuipid

Bleh Deffanie

by Barbarian123 June 28, 2016

Deffo

Deffo is a short form for defenetly.

"She deffo likes you."

by EhreEntwendet January 6, 2019

Deffeck

A chess piece that attack and defense at the same time. Notably the Knight. Noted by hartigor in Twich chat. The word had been acknowledge by GM Christian Chirila.

The knight on g4 Deffeck both f2 and e5.

by doorbook August 26, 2019

Deffs

A slang word used to describe the words defined on Urban Dictionary.

"Man, you should look and see the juicy deffs that are trending on Urban Dictionary right now!"

"I've seen my fair share of deffs in my lifetime so far."

by ConIII September 29, 2019