Home-brewed describes beer that someone made at home, not in a factory or a pub brewery. It is often a hobby: people buy a kit, boil malt, and wait while it ferments in a bucket or a bottle. The word can cover other home-made drinks too, such as wine, but beer is the picture most people have. Though actually, speakers stretch it: a home-brewed plan or a home-brewed fix means something you cooked up yourself, not a professional product — sometimes a compliment (you made it), sometimes a warning (it may be rough). You will also see home-brew as a noun for the drink itself. It is a friendly, informal word.