Michael Caine

Cockney rhyming slang for cocaine.

Caine is known for his pronounced Cockney accent. Cockney rhyming slang replaces works with ones that rhyme - “apples and pears” for stairs, “pork pies” for lies (and further shortened to “porkies”), etc. With an English accent, “Michael” sounds a bit like “my-co.” Add in his last name, and Michael Caine becomes slang for Peruvian marching powder.

“Are you coming the the party tonight? Make sure to bring your mate Michael Caine”