Tat refers to a type of decorative lace or textile created using a technique called tatting. This craft involves knotting threads together to form intricate patterns, often used for making lace doilies, edgings, and other ornamental items. Tatting can be done with a shuttle or a needle, allowing for various styles and designs. In addition to its decorative use, tat can also refer to items that are considered cheap or of low quality. This usage often describes trinkets or knick-knacks that lack artistic value or craftsmanship, contrasting with the traditional art of tatting.