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.
by AnaWanaMia? May 17, 2006
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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!?'
by Lil' Alex January 13, 2009
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