Bridie is a food that's a lot like a pie, but it's smaller and easier to hold in your hand. It's usually made with beef, onions, and seasonings, all wrapped up in a flaky crust.
Think of it like a little pocket of meat and vegetables that you can eat on the go. Some people even call it a Scottish pasty, which is another type of hand-held pastry.
The name "bridie" comes from the idea that it was originally made for brides to give to their grooms as a sort of pre-wedding snack. But nowadays, you don't have to be getting married to enjoy a tasty bridie.