Blow Hole

So there's a possibility they're going to put a blowhole in my head.  

The more technical term for this is a shunt - a device used to relieve pressure from the brain caused by brain fluids.

This would be near the top of my head - like a unicorn!  It would also mean they would shave my head.

Barb (without a beat):  I'll shave my head too!

Diane (without a beat):  Sorry, not that good a friend. 

Jamie (without a beat):  I could switch teams!

***

Shortly thereafter I learn that no blowhole is needed.