polyesterday Share definition Flag Da clothing-material I dressed up in last morning. And I'll "poly" wear it tomorrow, too. If I wore polyesterday, I "poly" would wear acrylic today, but then I'll again wear "poltomorrow". polyesterday by QuacksO October 30, 2025 0 0 Get merch Get the polyesterday mug. Buy Now — $32.95 See more merch