Xanthiholic Share definition Flag Someone drinking or eating a lot of xanthine containing things, like coffee, energy drinks, green tea and cacao as example... You drink so much coffee and energy, you have to be a xanthiholic. Xanthiholic by X10ded September 6, 2023 0 0 Get merch Get the Xanthiholic mug. Buy Now — $32.95 See more merch