Hello, incredibly new user here. I have always heard of sherm as a street term for PCP. The only documented one I can think of is from Chapelle's Show in which: Sheila: "Are you an angel," the angel replies "Me? An angel? I'm the janitor." She concerned asks "But....how did you show me those things?" the janitor says, "Girl, I am high on PCP! I was wondering how you were following me. You smoke sherm?"