Dropped stuff is a term used to describe substances that are dropped or thrown from a higher place to a lower one. In this case, the crossword solutions for the term dropped stuff are ACID and LSD. ACID is a four-letter word that refers to a group of compounds that contain hydrogen and can react with other substances. LSD, on the other hand, is a three-letter word that stands for lysergic ACID diethylamide, a powerful hallucinogenic drug.