A shadow selfie is a self portrait showing only the shadow of the photographer. This is generally used by shypeople or those who have taken too many fine art courses and want to create a sense of mystery in their images or enhance their image and or ego.
At sunset, Ralph noticed that his shadow was cast across the landscape making him appear ten times taller than he really is. He therefore took a photograph, a shadow selfie, to put on his Facebook page to enhance his image among his Facebook followers.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.