A phrase created by the
Youtuber/Twitch streamer, TerryTV. It is generally used towards someone who is acting a little crazy, over the
top,
extra, or simply just really hyper. Basically telling someone to calm down. Can be used in other situations where one should "chill out". It's used in a playful way.
Person 1: Omg I think my neighbor is stalking me.
Person 2: Calm thyself, he's just saying hello.
Person 1: I think my teacher saw me
cheating on my test!
Person 2: Calm thyself, he was looking at his
computer the whole time.
Person 1: I am so
hot
Person 2: *laughs* calm thyself