Flipping refers to purchasing an asset with a short holding period with the intent of selling it for a quick profit rather than holding on for long-term appreciation. Flipping is most often used to describe short-term real estate transactions as well as the activities of some investors in initial public offerings (IPO).
Although these are the most common use cases in finance, flipping can be used to generally describe the purchase of an asset that is meant to be sold in the near term for a profit, including cars, cryptocurrencies, concert tickets, and so on.