Superlative form of 'catty'; the most spiteful, malicious, or sneaky in behavior.
From 'catty' with the superlative suffix '-est.' Derives from the metaphorical comparison of human cattiness to feline stealth and unpredictability.
The 'cattiest' remark in a friendship can come out of nowhere, just like a cat pouncing—hence why people associate cats with sly, cutting comments!
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