When shoving your cats tail up ur partners anus, and jerking it around in a fast moving motion.
I was cat stabbing my girlfriend last night.
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Wanting to kill a person's cat as a result of them talking about their cat for too long.
Person 1: "If Eric talks about his cat one more fucking time I will kill it in front of him". Person 2: "wow, you've got a serious case of cat stab fever."