A way of saying that you do not want anything to do with something.

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.

Many might not know, but "No Parts" is "Strap on" spelt backwards! Mind blow, ay?