In crypto slang, a bag is a holding of a particular coin or token, usually a significant amount. Traders say they are "accumulating a bag" when buying steadily, or that they "have a bag" of a token they believe in. The word often carries a hint of irony, because it is frequently used for positions that have fallen in value, as in "left holding the bag". Someone stuck with a large losing position is called a bagholder. Talking up a token you hold, to push its price up so you can sell, is described as "pumping your bags", a habit linked to shilling and, in its extreme form, to pump-and-dump schemes. The term is informal and mostly used for altcoins rather than bitcoin.