Humphrey, as in Bogart, is another term for someone who is holding onto a joint, pipe, bong, or any other means of smoking marijuana while others are waiting to take a hit.
Humphrey is used to describe any unusual birth mark or freckle on sum1's face. It cant be sum1 with lots of freckles. Its just ONE freckle or birth mark on the face that catches ur attention and is really ugly. There is also a trisex humphrey which is wen sum1 has 3 humphreys that make a triangle on the side of their face.