gripping someone's ass to show affection or desire, especially in public.

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.

definition: when you grab tightly around your ass, or someone else's. Also used as and expression or interjection.