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Hmm, first I need to establish that this is a niche internet slang thing - not like it has a formal dictionary definition. The user seems aware of that since they asked for an "hilarious informative" explanation. They're likely familiar with online communities where fans creatively rename things based on memes or personality traits. The example sentence part suggests they want something unexpected and slightly dark to match the edgy request. Probably someone who enjoys subverting expectations while still keeping it clever. The key is balancing genuine information about what Cathy Engelbert actually means (from fanbase naming conventions) with that deliberately unsettling tone. I should structure this like I'm explaining a weird internet phenomenon - maybe start by acknowledging its meme origin, then break down the components ("Cathy" + "Engelbert"), explain common uses cases, and finally deliver that edgy example in a way that feels organic to the joke rather than forced. The humor comes from treating this silly fan convention with deadly serious academic tone. The user seems playful but not childish - they're probably an adult internet native familiar with meme culture. That means I can push the boundaries of edginess without being crude, focusing on dark humor derived from absurd applications. Maybe reference something
