A pound of fat equates to, very roughly, 3500 calories. So you would need a deficit of over 2300 calories per day to lose that much weight in a month. Try to keep your calorie level above 1200/day at a minimum. So if you’re drinking so much beer and eating so much food you’re currently consuming 3500 calories/day or more, then yes, it would be possible. But that’s not exactly a healthy amount of weight loss. Even halving the rate would still be pretty aggressive. I get wanting to see tangible progress, but I would strongly encourage you to do this over two months instead of over a month.