What is a name for this typology?

The bid-ask spread is the difference between the highest price a buyer is willing to pay and the lowest price a seller will accept for an asset. While it is an important concept in trading, it does not describe a trading typology like wash trading, which specifically involves deceptive practices.

The term "reverse flip" is not a recognized trading term or typology in financial markets. It may imply a type of transaction or strategy, but it does not accurately describe any established practice akin to wash trading, which is characterized by simultaneous buying and selling by the same party.

A short position refers to the practice of selling a security that the seller does not own, with the expectation of buying it back at a lower price. This strategy involves speculation on price declines and does not correlate with the concept of wash trading, which involves creating fictitious market activity rather than actual speculation on price movements.