A plastic shieve inserted in one's shirt pocket to prevent pens from leaking and staining the shirt.
As far as i am aware it was invented in the US, and never exported to the rest of the world.
Not popular anymore, even among geeks
Synonyms for Pocket Protector
On this page, you will find 30 slang terms related to pocket protector. Some of the top words include: Shit-Pocket, Firework, STUD, bmx, fast, and 25 more.