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A Scottish way of telling someone to get the hell out before you slap them
'Fack Oof' echoed through the pub as the barman threw a pint at the drunk who wouldn't stop talking.
'Fack Oof' was the only reply when the neighbor yelled through the wall about his loud party again.
The kid in class screamed 'Fack Oof' when the teacher asked him to do his math homework.