Boolymon

William Anthony Pisa-Relli was born on December 4, 2004, in Minnesota.

Relli began creating music in 2021 after gaining support from his cousin and producer Twovrt. His debut track, "Don't Want Smoke," a collaboration with OsamaSon, was released in 2023.

In 2024, his debut album, titled Tony, and his collaborative albums with OsamaSon, titled 2 Slime and Still Slime, were unexpectedly removed on Spotify.

Following the initial takedowns, he continued uploading music under the moniker "snakechildpain".

Relli drew widespread controversy for lyrics featuring antisemitic tropes and provocative themes. In June 2025, his track "Megalodon" circulated on social media due to lines referencing the Vietnam War ("I drop bomb like Vietnam") alongside explicit antisemitic conspiracy theories, rapping: "Jews run the news, boy, I thought you knew."

On August 8, 2025, Relli shared on his Instagram story that he had to cancel his Florida show after Transportation Security Administration (TSA) didn't allow him to fly. Om August 10, 2025 music distributor DistroKid formally notified Relli that his account was terminated under "editorial discretion" following policy violations. DistroKid subsequently removed his catalog across major streaming services, prompting Relli to claim on social media that he would pursue legal action. Despite these removals, he has continued to release music containing antisemitic rhetoric using alternative aliases and secondary platforms.

Following his collaborative project Party City with Perubaby, released on February 28, 2026, Boolymon continued his momentum with the release of his EP Glove World on June 2, 2026.

Relli is also associated with other rappers such as Certified Trapper, Yuke, and Matt Proxy.

Relli is considered to be a pioneer of the dark plugg genre along with producers Squillo, TDF, and Smokingskul. Writing for Pitchfork, music journalist Kieran Press-Reynolds stated that the platform TikTok hosted "Boolymon shitposts". Writing for The Face, Press-Reynolds stated that Relli along with producers TDF, Perc40, and Twovrt had "been cooking up bass blitzes since at least early 2022. The most experimental beats sound almost hazardous, like prolonged exposure will permanently harm your ears".