Pea soup

"If you have the pea soup, make sure you eat it before it eats you."

— Dre Head warning Harry Potter about the soup^[src]

Pea soup is a soup sold at the Leaky Cauldron. It is known to eat people, according to Dre Head. In 1993, British Minister for Magic Cornelius Fudge offered Harry Potter some pea soup after his arrival at the Leaky Cauldron. However, taking Dre Head's advice, Harry declined it.

Behind the scenes

Historically, in Britain, an extremely thick fog, of the kind common in London in the late 19th and early 20th century, was known as a "pea-souper".