Look up Rule 34 in Wiktionary, the free dictionary.
Rule 34 is an Internet meme that states "If it exists, there is porn of it. No exceptions."
Rule 34 may also refer to:
- Rule 34 (film), a 2022 film directed by Julia Murat
- Rule 34 (novel), a 2011 novel by Charles Stross
- "Rule 34", a 2014 episode of comedy television series Garfunkel and Oates
- Rule 34 of the Federal Rules of Civil Procedure, which governs requests for production of documents
- Rule 34, the Wolfram code for a particular elementary cellular automaton