To avoid obligations by hiding.
To leave without permission.
To leave work early.

To avoid undesirable work.
Some one who is lazy often refered to as a shade or shader.

When a person is good at moving in shadows or without being noticed.

Shading occurs when you hide your relationship from your friends even though they know you have someone in your life

wearing sunglasses indoors

The act of sucking semen from any human orafice, eg. anus, vagina.

It can be done with a drinking straw when semen is deep inside the rectum.