SOB x RBE consists of Yhung T.O., DaBoii, Slimmy B, Kiing Road and formerly Lul G. SOB x RBE, often called simply SOB, originate from Vallejo, CA, and have been mentored by rapper Sage the Gemini, with whom they have toured with. SOB originally stood for “sneakers over bitches”, but once the group started making music they changed it to Strictly Only Brothers. Slimmy B, DaBoii, and Lul G were all part of SOB. RBE stands for Real Boy Entertainment and was Yhung T.O.’s groups. The 2 groups combined into SOB x RBE when they were in high school and started recording music together.

The group started gaining major recognition in Northern California after they released their song “Anti”, leading to the release of their first project SOB X RBE.

In early 2018, the group released their sophomore project Gangin, and at the same time were featured on Kendrick Lamar’s Black Panther: The Album. Their song “Paramedic” off the album helped push SOB into the mainstream.

In late 2018, the group dropped their third project Gangin II.