X rating - Wikipedia

The Brief and Scandalous History of the X Rating

X (2022) - IMDb

FSM Board: Films That Received an X Rating in the U.S.

Saw X - Rotten Tomatoes

Greetings-1968-27x41-Brian De Palma-Robert De Niro-RARE-X rating!

The movie ratings G, PG, PG-13, and R are obvious in why they are different. But what are the difference between NC-17, X, and Unrated? - Quora

Fast X (2023) Review – The Action Elite

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Review: 'Fast X” gears up for more road rage, sets up sequels - Brainerd Dispatch

James Bond film Thunderball nearly given 'X' rating by censors