Ho99o9 (pronounced Horror) is an American punk rap duo founded in 2012 in Newark, New Jersey by theOGM and Yeti Bones.

To date, they have released multiple EPs, accompanied by grindhouse-style music videos, and two full-length albums, United States of Horror (2017) and SKIN (2022).

They were influenced by hip-hop and gangsta rappers (DMX and Bone Thugs-n-Harmony) in their teens, but later began attending underground punk shows in Brooklyn featuring Japanther, Cerebral Ballzy and The Death Set as well as Ninjasonik, Theophilus London and the A.L.I.E.N.

They played the Eurockéennes, Vision, OFF, Pukkelpop, Lowlands, Pop-Kultur Berlin, Iceland Airwaves,[14] and the Reading and Leeds music festivals in the summer of 2015.

[16] Ho99o9 collaborated with director Bryan Ray Turcotte and photographer Estevan Oriol to capture their performance in their video, "Casey Jones/Cum Rag" which was premiered and was hosted by the Museum of Contemporary Art, Los Angeles.

[37] Loud and Quiet described Ho99o9's sound as a "seething collision of anarchic hardcore punk rock and industrial charged death rap".

[10] They have often been compared to punk rock band Black Flag and experimental hip hop group Death Grips.