A goblin is a mischievous or malicious creature from folklore and fantasy stories, usually depicted as small, ugly, and fond of causing trouble. Goblins appear in fairy tales and legends from many cultures, where they might steal food, play mean pranks, hide valuable objects, or frighten travelers in the woods at night.

In modern fantasy books, movies, and games, goblins have become a standard creature type. They're often portrayed as greedy, cunning, and a bit cowardly, sometimes working in groups to overwhelm opponents with numbers rather than strength. In The Hobbit, Bilbo Baggins and the dwarves encounter goblins living deep in mountain caves. In fantasy role-playing games, goblins are frequently the first monsters adventurers face.

The word can also describe a person, especially when you call someone a “little goblin” in an affectionate or teasing way. You might call your younger sibling a goblin when they're being particularly mischievous, sneaking cookies before dinner or hiding your homework as a prank. Unlike calling someone a monster (which can sound mean), calling someone a goblin usually has a playful tone, suggesting they're more annoying than actually harmful.