Goony is a word that colloquially means foolish or silly. Some synonyms that can be used in place of goony are dippy, silly, foolish, nonsensical, absurd, kooky, and ridiculous. These words also describe actions or behavior that may appear amusing or strange to others. A person can be described as goony if they behave in a ridiculous or silly manner. This term is frequently used in a playful or teasing manner and may not necessarily be meant as an insult. Additionally, goony can be used to describe things such as hats or clothing that are amusing or odd-looking.