"Chilling" Natural Recordings by Native Speakers
To be "chilling" means to be extremely cold, usually to a level that is uncomfortable or even unpleasant. It can also be used to describe something that is frightening or unsettling, often in a subtle or creeping way, rather than in a dramatic or sudden manner. For example, "The air was chilling, so we had to turn up the heater." or "The eerie silence was chilling, and it felt like we were being watched."
Adjective: Chilliest refers to the coldest or coolest. It can also describe a person's temperament, meaning calm, relaxed, or laid-back.