Lose (one's) shit vulgar verb phrase
Have an outburst of an emotion, especially anger; lose the ability to think clearly
My mom lost her shit when knowing that I played truant today.
He totally lost his shit when he knew the truth.
The girl lost her shit when knowing her boyfriend cheating on her.
Express one's feelings of anger very strongly in spoken words
To look or glare very angrily at someone
This phrase is used to describe something very modern or updated or something that no longer looks like what it's used to.
It has been a long time since I left my high school, and now I have to admit that it's certainly not your father's high school anymore.