Jahmier Velazquez (born July 6, 1998), known professionally as Comethazine, is an American rapper and songwriter. He is best known for his single "Walk", which peaked at number 20 on the Billboard Bubbling Under Hot 100 chart.

Comethazine has released four mixtapes since 2018, Bawskee, Bawskee 2, and most recently Bawskee 3.5, all to mainly positive critical reception. In 2019, he was an XXL Freshman and performed his cypher alongside rappers Roddy Ricch and Tierra Whack.

On March 27, 2020, Comethazine's debut studio album Pandemic was released.

Comethazine began posting his music on audio distribution platform SoundCloud and video distribution platform YouTube as a teenager, allowing him to quit his job as a mechanic to focus on music full-time.

In early 2018, a feature on SoundCloud that allows their original sound file to be switched was abused for an unofficial upload of YBN Nahmir's song "Bounce Out With That", that was replaced with his song "Bands", causing it to acquire the chart data of "Bounce Out With That".[It is unclear who perpetrated this, though the account associated with the switch has since been removed. This incident helped increase the popularity of "Bands". Comethazine's debut mixtape was critiqued by Alphonse Pierre of Pitchfork for its perceived lack of originality. In 2019, he was selected to be a part of the 2019 XXL Freshmen Class.

Comethazine's music has been compared as a mixture of Playboi Carti, Tay-K and Rich White Man a derivative form of trap that uses the bass as a source of melody instead of traditional instrumentation. He has cited rappers such as Big Mike, Chingy, Jadakiss, Chief Keef, Playboi Carti, and Jim Jones as musical influences.