yam yam

noun3

1. •
   (informal, offensive) A person who speaks the Black Country dialect.

   • "What's 'er say?" 'Er said: "Am yow a Yam Yam?", Ah said "Ar bab, I am!". — 2019
2. •
   (informal, disapproving) The dialect spoken in the Black Country.
3. •
   (informal) Heroin.

   • In the episode with Robert Duvall, Buz revealed that in the past he had his own problems with the White Horse, the Brown Sugar, the old Yam Yam, which seemed like a really cool thing to me. — 2010