A friendly euphemism for someone who's extremely high on pills, but wont admit it directly out of social etiquette.

Usually used by hipsters in social situations where bogan phrases such as "i was chewing my fucking face off" are considered vulgar and inappropriate

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.