The phrase "for the birds" is often used to indicate that something is worthless or meaningless. However, there are various synonyms that can be used to convey the same message in a less repetitive manner. Some of these include "nonsensical", "unimportant", "trivial", "useless", "worthless", and "insignificant". In informal contexts, slang terms like "pointless", "meaningless", and "irrelevant" can also be substituted for "for the birds". Using a diverse range of synonyms can help writers to avoid sounding repetitive and to convey their message in a more engaging and varied way.