- have kittens
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1. tv. to become enraged.□ When I heard the news, I had kittens. I was hacked!□ I almost had kittens, I was so mad.2. tv. to laugh very hard; to enjoy something enormously.□ It was so funny, I had kittens laughing.□ She had kittens laughing about it.3. tv. to be surprised.□ I nearly had kittens when I heard.□ She had kittens when she heard about the wedding.
Dictionary of American slang and colloquial expressions. 2015.