A phrase made famous by Senora Soria. It was originally made up to describe a crossword puzzle, but it is now possible to use it as a noun, verb, or adjective anywhere you want.

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.