vibe changer 

someone or something that changes the vibes

i farted and everyone got quiet, was a vibe changer

vibe changer by moony767 February 12, 2021

Vibe Change 

An alter in the vibe between two or more people. Most often a secondary explanation for rejection. Can be mutual or one sided.

Me and Betrice were talkin a couple weeks ago. I didn't get rejected, there was just a subtle vibe change in the atmosphere.

Vibe Change by VibeBeast October 29, 2019