jeffing it 

to contribute nothing: useless; to be useless

i was jeffing it in the back when you needed some help

jeffing it by incomingTRASH February 22, 2010

Jeffing It 

(verb) to masturbate profusely in the company of others

I was trying to go to sleep but he just would not stop jeffing it.

Jeffing It by disgruntled0001 March 20, 2024

Jeffing off 

Ripping a hot guitar solo in someone’s newly melted face

God damn he was jeffing off so hard

Jeffing off by Tiddeez April 12, 2024

Jeffing off 

When you edge yourself to tears

He was in his car jeffing off after work, I saw his mascara run.

Jeffing off by Drows420 July 14, 2025

Effing and Jeffing

A variation on the term "Effing and Blinding", meaning to swear or curse profusely. Used in the North of England, notably by one Karl Pilkington in an episode of the Ricky Gervais Show.

Karl: I've just slagged off that octopus, but at no point was I effing and jeffing about it.

Effing and Jeffing by AnaWanaMia? May 24, 2006

Face jeffing

When one decides to royally ruin another's face with their penis

Hey little lady how's about a face jeffing

Face jeffing by Little lemon nipper May 31, 2018

effing jeffing 

Means the same as effing (fucking), but has 'jeffing' on the end, for no other reason than it rhyming rather well.

'effing jeffing hell'

'effing jeffing watch yourself'

'what the eff jeff is that!?'

effing jeffing by Lil' Alex January 13, 2009