Aluminium fold Share definition Flag An aluminium fold is when your buttcrack is so wet it goes kind of silver and hard but lightweight aswell. yo bro last night i had the worst case of aluminium folds!. Aluminium fold by blazefister69.420.666 November 27, 2019 0 0 Get merch Get the Aluminium fold mug. Buy Now — $32.95 See more merch