The word "poxy" is a slang word used to describe something or someone of low quality or value. There are a variety of synonyms that can be used in place of "poxy" depending on the context and tone. Some more formal synonyms include "inferior," "substandard," "shoddy," or "deficient." If you want to use a more informal synonym, words like "crappy," "janky," or "trashy" might be appropriate. Other synonyms that are more specific to certain contexts include "cheap" for pricing, "tacky" for aesthetics, and "unfit" for a person's capabilities. Choosing the right synonym can help communicate your meaning more effectively and enhance the overall impact of your words.