Which substance is typically laced with PCP to create “Sherm”?

The substance that is typically laced with PCP (phencyclidine) to create "Sherm" is marijuana. Sherm refers to a form of marijuana that has been dipped in or sprayed with PCP, which is a dissociative anesthetic that is associated with various psychoactive effects.

When marijuana is combined with PCP, users may experience a heightened sense of euphoria, altered sensory perception, and, in some cases, more intense hallucinations than they would with either substance alone. This combination can pose significant risks due to the unpredictability of the effects of PCP in particular, which can lead to dangerous behavior or acute medical emergencies.

Marijuana is the most common base for this mixture, as the two are often used together recreationally. The other substances listed, such as tobacco, cocaine, and heroin, are not typically combined with PCP to create Sherm. Each of those substances has its distinct effects and usages and does not have the same reputation or historical context as marijuana in relation to PCP.