The Black Dog is a restaurant and tavern in Vineyard Haven on the island of Martha's Vineyard. The restaurant was founded in 1971, and became well known for its souvenir T-shirts, featuring its logo of the eponymous black dog. They subsequently expanded to sell other products with the same logo.[1][2][3]
The Black Dog T-shirts (became well known during the 1990s as photographs of celebrities) wearing the shirts began appearing in national publications. For example, a photograph of then-President Bill Clinton jogging while wearing one was distributed by national wire services. Black Dog merchandise became part of the Lewinsky scandal, as items from the store were purchased by Bill Clinton and given to Monica Lewinsky.[4][5]
https://en.wikipedia.org/wiki/The_Black_Dog
Good Will Hunting
lots o trends coming from the Vineyard
Black Dog Black Dog Black Dog
One famous black dog in English folklore is Black Shuck. Shuck derives from an old Anglo-Saxon term, scucca or sceocca, meaning “Demon” or “Satan.” During the European witch hunts, witches were often said to have Familiars in the form of black dogs, or to be visited by their master, the Devil, in the shape of a black dog.
https://occult-world.com/cryptozoology-canine/black-dogs/
kappy was right!