A sheriff told a woman he was "astonished" on Wednesday - after she admitted drinking around 100 units of alcohol every week.
Michelle Watt, 30, made the admission about her boozing in a social work report after she admitted assaulting one of her neighbours.
Sheriff Robert McCreadie asked Watt if she knew how many units were contained in a bottle of wine and she replied that she had no idea. He told her the weekly limit for a woman was 14 units.
Watt's drinking is the equivalent of 100 small measures of vodka, 50 pints or as many as 12 bottles of wine every week.
Sheriff McCreadie said: "For a woman, she is drinking an amazing 100 units of alcohol a week. What the report says is that her consumption may have been 100 units each week.
"It is astonishing, and utter stupidity, to drink that amount of alcohol. It is utterly astonishing that anybody could think that amount of alcohol could be appropriate."
"When people get drunk and can't recollect what went on its because they have been damaging their brain. If you kept drinking like this you would have irreversibly damaged your brain."
Perth Sheriff Court was told that Watt, of Catmoor Court, Scone, Perthshire, attacked one of her neighbours on 22 February by pulling her hair and punching her head. She also admitted a second charge of breaching the peace by shouting and swearing and refusing to leave her neighbour's home.
Sheriff McCreadie deferred sentence for six months for good behaviour and for a report on Watt's boozing. He added: "Given the drinking problem she has - and it is a significant one - I doubt it will disappear overnight or be suddenly under control."
