The term "batty" is an informal adjective used to describe someone who is considered crazy or eccentric. It often implies a playful or lighthearted sense of madness rather than a serious mental illness. People might use "batty" to refer to quirky behavior or unusual ideas that are harmless and amusing. In popular culture, characters described as batty often add humor and charm to stories. For example, the Mad Hatter from Alice in Wonderland is a classic representation of a batty character, known for his whimsical thoughts and nonsensical conversations. Such portrayals highlight the fun side of being a little offbeat.