This refers to a type of nail art where a paste brick technique is used to extend the length of artificial nails. The 'paste brick' technique involves adding a small block of nail extension material to the tip of the natural nail, which is then shaped and polished to look like a natural nail. This method is popular among nail artists and can be seen in various internet celebrity nail art tutorials. It is important to ensure proper application and maintenance to avoid damage to the natural nails.