What you call the bathroom when you have to go in public, especially if you have to go number 2. You call it a sanctuary because it keeps you safe while you do your buisness. The term was popularized by Marc Elliot, a public speaker with tourettes and an intestinal problem, when his friends came up with a nickname for his special place.
Can be a noun or verb, and called sanctuary, sanc, or sancing.
noun- "Brb, I need to visit the sanctuary."
verb- "I really have to go sanctuary, can you point me to the nearest restroom?"