Cumcain is made when a male ejaculates semen, then its put onto a hard surface, you wait for it to dry, scrape it off with a blade, cut it up into a thin powder, and snort it. Commonly consumed by women.
"Daddies cumcain had me feeling like a dirty little cunt."
"All my exes have made different cumcain, its wild."
"After I sucked Ryans cock I went into the bathroom and rubbed it off my face onto the counter. In the morning I cut that shit and got so fucking high."