The Boogeyman

Tall
It's commonly referred to as either around or above ten feet in height.

No Eyes or Nose
Of those that have "seen it", they say that there are no eyes or noses, or human-looking ones, on it's face.

Smooth Face
The Boogeyman's face is commonly describes as without imperfections, as smooth as a baby, without any defining marks except for their body parts.

Bony
The Boogeyman is said to have a near skeletal like appearance, those that have seen it describe it looking like what a starved corpse appears to be, every single bone is visible.

Nonsensical Skeletal Structure
Despite being able to see nearly every bone in the Boogeyman's body, it's skeleton seems to shift and change every time the viewer looked away, and it's layout had no way to support a living

Large Mouth
Compared to the rest of it's face, the Boogeyman's mouth is especially large, taking up most of it's lower face

Sharp Teeth
The teeth of the Boogeyman have constantly been described as sharp, around 6 inch long canines.

Long Limbs
The limbs of the Boogeyman are paranormally long

Clawed Hands
Those who dreamt of the Boogeyman vividly remember the clawed hands it wielded, each finger as long as a shortsword, and sharper too

Pitch-Black Skin
It blends into the night, like a void of existence, a polar opposite to being. It is not a color so much as an absence of it