Antonyms for the phrase "being appropriate" include words such as improper, unsuitable, unsuited, unfitting, irrelevant, and inappropriate. When something is deemed inappropriate, it means that it is not fitting or inappropriate for the occasion, place, or individual concerned. The term unsuitable conveys the idea of something being unsatisfactory, unbecoming, or inadequate, while unsuited refers to something being mismatched, ill-suited, or incompatible. Improper, on the other hand, suggests that something is contrary to what is acceptable or violates social norms. In conclusion, antonyms for the phrase "being appropriate" all convey the idea that something is not suitable for a particular context, setting, or audience.