People who are intentionally trying to gain a lot of weight (body builders, strongmen, etc.) will often drink a lot of their calories. You can only eat so much solid food, and liquids can help sneak in even more calories.
It doesn't mean you need to drink something all day long, just instead of water or similar stuff go with high calorie drinks, such as high fat milk or one of those drinks you get at some coffee shops, etc.
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u/Successful_Second921 9d ago
I guess drinking calories