The name of silence
A state of fragile stability in a friend group that was barely reached after an incident. It's so fragile that it'll instantly shatter and awkwardness will return if anyone tries to vocally appreciate it, just like how silence breaks when you say its name.
Person a: "I'm so glad we're all friends again after what happened between us."
Person b: "Dude, stop saying the name of silence FFS!"
Person b: "Dude, stop saying the name of silence FFS!"