Is PINUP a Wordle Word?

Yes. PINUP is a valid Wordle word.

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

What does PINUP mean?

A photograph, printed in a magazine or other publication, of a sexually attractive person (often nude or provocatively dressed), and intended to be removed and pinned up on a wall.
The person so depicted.
Figurehead, person who represents an idea, cause etc.

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

Starter word rating: WeakIn the top 91% of all valid Wordle words for testing common letters.
Vowels: I, U
Unique letters: 4 of 5Repeats P
Common letters: I

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.