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hysterics 
1  n-plural If someone is  in hysterics or is having hysterics, they are in a state of uncontrolled excitement, anger, or panic. 
INFORMAL oft in N 
I'm sick of your having hysterics, okay?...  
2  n-plural If someone is  in hysterics or is having hysterics, they are in a state of violent and disturbed emotion that is usually a result of shock. 
oft in N  (=hysteria) 
It was such a shock I had hysterics...  
3  n-plural You can say that someone is  in hysterics or is having hysterics when they are laughing loudly in an uncontrolled way. 
INFORMAL oft in N 
He'd often have us all in absolute hysterics.