An anti-record is a musical vinyl

Gramophone record

A gramophone record, commonly known as a phonograph record , vinyl record , or colloquially, a record, is an analog sound storage medium consisting of a flat disc with an inscribed, modulated spiral groove...

 record which has been treated (melted, drilled, painted, etc.) so that it becomes a noise

Noise

In common use, the word noise means any unwanted sound. In both analog and digital electronics, noise is random unwanted perturbation to a wanted signal; it is called noise as a generalisation of the acoustic noise heard when listening to a weak radio transmission with significant electrical noise...

 record. While this term was first used by LAYLAH Records on conventional vinyl releases by Current 93, Nurse With Wound and others, Ron Lessard of RRRecords

RRRecords

RRRecords is a used and new record shop. RRRecords is distinguished as being the first American record label to specifically publish underground noise music in the early 1980s, and published the first American vinyl by Merzbow, Masonna, The Hanatarash, Violent Onsen Geisha, and many more artists...

 applied the term to a series of physically altered records released by RRR in 1988. Anti-records can also be records featuring strange configurations or pressing, such as extra or unusually sized holes, locked grooves, and parallel grooves. One notable noise anti-record was created by noise artist Boyd Rice

Boyd Rice

Boyd Blake Rice is an American experimental sound/noise musician using the name of NON since the mid-1970s, archivist, actor, photographer, author, member of the Partridge Family Temple religious group, co-founder of the UNPOP art movement and current staff writer for Modern Drunkard...

and contained locked grooves as well as multiple center holes. RRRecords also published a record containing 500 locked grooves by various artists.