The spelling of the word "POOS" may seem unusual or even incorrect to many readers. However, it is a legitimate spelling of the word "PUSS," which is a slang term for cat. The spelling with double O is a result of the phonetic transcription of the sound /ʊ/ in IPA. This sound is often spelled as "oo" in English, as in the word "book." The spelling of "POOS" can also be seen as a playful or humorous take on the word "PUSS."