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
people often do irrational or foolish things when they are in love.
I and my boyfriend have decided to get married in the summer. I don't think that's wise, since we won't have enough money saved by then to set up house. But then, one cannot love and be wise.