Exactly what it sounds like: it's an unannounced restock that can occur at any time, and it can have a totally random assortment of items in it. I realize that for some customers, the unpredictability of this restocking method is stressful, but it is not intended to cause distress or 'FOMO'. To the contrary, a stealth drop is supposed to reward the occasional 'check-in'. Anyone who happens to stumble upon a surprise restock will have significantly more time to peruse the items in a far less stressful environment than a typical high-pressure rush at an announced drop. Stealth drops are also intended to reduce buyer's remorse by giving customers a chance to think about whether they actually want the item, rather than feeling compelled to grab it as quickly as possible, and/or reschedule their entire week simply to stalk a particular toy and hope to compete against potentially dozens of other customers. Scheduled drops can be so competitive that you do not have time to read listing details or consider how much you want the item. By contrast, you might be the only person to notice a stealth drop for a good amount of time, potentially for a couple hours (until someone blows the whistle on it, that is). Please do not inquire about the time or contents of stealth drops. I can't answer such questions, or it's not a stealth drop. As of the time I'm editing this article (4/10/2024), there are no stealth drops being planned for the immediate future. These were more of a necessity when product was moving faster than I could restock it. Now that the economy has slowed, so has the pace of normal drops, and stealth drops are not currently needed.