"hysterical" in the adjective sense
1. hysteric, hysterical
characterized by or arising from psychoneurotic hysteria
"during hysterical conditions various functions of the human body are disordered"- Morris Fishbein
"hysterical amnesia"
2. hysterical
marked by excessive or uncontrollable emotion
"hysterical laughter"
"a mob of hysterical vigilantes"
Source: WordNet® (An amazing lexical database of English)
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