Deffing 

1. To be worried or scared about something, frequently used to describe a drug-induced state of paranoia.

2. To vomit.

Origin: Great Grimsby. Possibly originally evolved from the word 'defecate', via 'shitting it'.

1. 'I'm deffing', 'She's deffin'-out', 'I deffed-out', 'Deff-out'

2. 'I just deffed'. 'He's deffin''.

Deffing by spacecaked March 31, 2011

derfing 

Aggressively grinding each other while making out.

Abby was derfing so hard last night with him.

derfing by yunglivin September 1, 2019

Derfing 

Sex with clothes on

Cooper: hey Claudia wanna go derfing later?

Derfing by Derfingyurrrmom October 30, 2019

Duffington 

There is an urban legend, of a powerful rage, that awakens inside the human soul. There is someone named Duff, and inside him lays rage incarnate. When the rage boils to the surface, he transforms into Duffington. Duffington is a dark entity that revels in the night and looks for unsuspecting victims to slaughter. It is impossible to know when he is coming for you and impossible for anyone to track him, as he glides over the ground and melds into shadows. The last thing victims ever hear is a small cackle before their throat is slit.

Joe: What a nice night!
<sees a dark figure approaching swiftly>
Joe: Hey! Who are-
<SLICE>

Duffington by Phil Vargas April 21, 2005

doffing 

Taking off clothes, equipment, etc.

Practice donning and doffing your equipment.

doffing by CoUrtCoUrt February 1, 2007

Deffinately

A common miss-spelling of the word Definitely
Dumbass.

"We so deffinately have to hang out!!!1!"

Deffinately by Tsiana September 30, 2008

Diffing 

Term used in Ireland for spinning a RWD car in circles, what Americans would call a donut. Very popular in Mk2 escorts, 80s/90s BMWs and Twin Cams

Sir, you shoulda seen the lads diffing the twin cams last night outside Dungannon

Diffing by Doire Abú September 22, 2009