Poxy is an informal word used to call something rotten, lousy, or worthless. It is based on the literal sense of poxy, meaning that someone has the pox (either syphilis or smallpox).

Is poxy a valid scrabble word?

Yes, poxy is in the scrabble dictionary.

Is poxy in the Oxford dictionary?

poxy adjective - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com.