The stench of diseased vagina, often used to define a person that truly disgusts you

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.

An odour smelt drifting from under the bed sheets after a particularly vigorous bout of fucking. Bellowing the sheets as one does with ones own farts will increase the strength of the stench.