The antonym for the phrase "am business" can vary depending on the context. If "am business" refers to being engaged or occupied with work, then the opposite would be idle or unemployed. On the other hand, if it pertains to the business as an entity, the antonym may be inexperienced or non-existent. Another possible antonym for "am business" could be disinterested or uninvolved. When considering opposites, it helps to take into account the intended meaning or significance of the phrase. Whether it's related to work, a particular industry, or a professional setting, the antonym can range from apathy to prosperity.