The Fanum Tax is a term that has recently become popular on social media, particularly on TikTok. It was coined by the comedy creator Fanum, who is a member of streamer Kai Cenats influencer crew AMP. The phrase refers to the way Fanum would jokingly "tax" other members of AMP in 2022 by taking bits of their food when they were eating. Essentially, granting someone Fanum tax status means that youd let them have some of your food without them necessarily having to ask. Its kind of like when a romantic couple isnt exactly sharing a meal with their significant other, but they are subtly offering bites of their food. The term has since picked up in popularity and has been used somewhat ironically by older creators to poke fun at the younger generation who overuse internet slang. "Youre so Fanum Tax" is a popular ironic variant of the phrase used online.