freak out

listen to the pronunciation of freak out
Englisch - Englisch
To react (or cause to react) with extreme anger or fear to something to the extent that one loses one's composure or behaves irrationally; originally, to suffer an unexpected and severe bad reaction from the recreational use of a psychotropic - usually hallucinogenic - drug

Jimmy'll come in off the road, you won't be there, he'll freak out and call you a hundred thousand times.

If someone freaks out, or if something freaks them out, they suddenly feel extremely surprised, upset, angry, or confused. I remember the first time I went onstage. I freaked out completely I think our music freaks people out sometimes It sort of frightens me. I guess I am kind of freaked out by it
lose one's nerve; "When he saw the accident, he freaked out"
lose one's nerve; "When he saw the accident, he freaked out
a wild delusion (especially one induced by a hallucinogenic drug)
become very excited, go wild, lose one's cool, undergo a sudden mood change (Slang)
A frightening or disorientating experience, especially one that results from the use of a hallucinogenic drug
An occurrence of unrestrained or irrational behaviour
freak out