The word "catty" is an adjective that describes someone or something as slyly malicious or spiteful, particularly in speech or remarks. When someone is being catty, they are usually making subtle, hurtful comments intended to annoy or upset others. This term is often used to describe mean, nasty, or bitchy behavior, especially among women, though it can apply to anyone who acts maliciously. It can also relate to something characteristic of a cat, but this is a less common usage. Additionally, "catty" is used as a noun referring to a traditional Chinese unit of weight, approximately 500 grams or 1.1 pounds, but this is unrelated to the adjective meaning. The primary and most common understanding of "catty" refers to unkind, spiteful behavior or speech.