Definition: A milder version of POS; sometimes refers to a piece of junk, but may also used as an exclamation towards someone else, i.e., in online gaming, when someone sneaks up behind you and kills your character, you might type, POC! Example
You may have noticed that your lips turn purple or blue in the cold, or you may have seen a baby, an elderly person or someone else with bluish or purplish lips. In many cases, this type is caused by cyanosis, which is a discoloration of a part of the body resulting from a lack of oxygen in the blood.
Deficiencies in B vitamins can cause pealing around the edges of the lips and on the lips. I used to have pealing at the corners of my lips really bad. The skin on my face at the corners. I had never heard that B vitamin deficiency can cause this.