A crush fetish is a fetish and a paraphilia in which sexual arousal is associated with observing objects being crushed or being crushed oneself. The crushed objects vary from inanimate items (e.g., food), to injurious and/or fatal crushing of invertebrates (e.g., insects, snails, worms, spiders), or vertebrates (e.g., birds, reptiles, mammals).

In the most severe cases, crushing has involved homicide or extended torture until death of restrained animals including dogs, cats, pigs, and monkeys. Animal welfare organisations, such as the Humane Society of the United States, condemn this practice and consider it extremely disturbing. The motivation for these acts may be the production of a film recording the events, which is sold on the Internet to crush fetishists who find the content sexually gratifying, a tailored genre known as "crush film".

There are currently no laws specifically forbidding the crushing of animals, but the production or trade of crush erotica involving live vertebrates is illegal in many countries, including the United States and the United Kingdom. In the United States, interstate commerce in (hard) crush videos has been illegal since 2010, and many other countries also have banned them.