What is another word for crack up?
Pronunciation: [kɹˈak ˈʌp] (IPA) 
The English language is full of colorful expressions, and "crack up" is no exception. This phrase generally means to break down emotionally or to lose control in a fit of laughter. However, there are a myriad of synonyms that can be used to describe such an event. For losing control emotionally, one might say you had a breakdown, lost your cool, or had a meltdown. For laughing uncontrollably, you could say you were in hysterics, doubled over, or unable to contain your laughter. Whatever way you choose to describe it, a good crack up can be both cathartic and entertaining.
