Uncomfortablely hot.

Only ever heard used in North East England.
By 'eck, take wood from t'hole our mam, I'm absolutely mafted.
by Tinks April 14, 2005
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It's mafting in 'ere!
by Sarzy September 18, 2003
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There are three levels of mafting - mafting, which would be warm enough to fry an egg on your leg; bloody mafting, which would be warm enough to roast a turkey on your leg; and fucking mafting, which would be warm enough to smelt gold on your leg.
"Feel my leg! It's bloody mafting!"
by Chris Beesting September 25, 2009
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when it becomes unbearably hot and one feels sweaty and uncomfortable in the heat
when you wake up and you're really hot, and just a little bit sweaty....that's a 'maft on'
by Timothy Griffin June 11, 2009
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