Is PISSY a Wordle Word?

Yes. PISSY is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does PISSY mean?

/ˈpɪsi/

Covered in urine.
Resembling or smelling like urine.
Anal retentive, whinging and pernickety.“Stop being pissy: you knew what I meant when I said "Don't touch the dial", but you prodded the dial with a fork.”

2 more adjective definitions

(of rain) Weak and drizzly.“I wish these pissy rain showers would either build up into a storm or go away.”
Angry, in a bad mood (see pissed off)

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: WeakIn the top 90% of all valid Wordle words for testing common letters.
Vowels: I
Unique letters: 4 of 5Repeats S
Common letters: I

Hard-mode trap: 6 valid words fit the pattern _ISSY. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.