A more thorough explanation:

Definition: A scalper is someone who buys something, such as a ticket, at its original price or lower and then tries to sell it for a higher price.

For example, if a popular band is performing and tickets sell out quickly, scalpers may buy tickets at face value and then resell them for a much higher price to people who were unable to get tickets. This is often illegal and can be considered a form of fraud.

Scalping can also refer to an investment adviser who buys a security before recommending it to clients, or a market-maker who puts an excessive markup or markdown on a transaction.

Overall, scalping is a practice that takes advantage of supply and demand to make a profit, often at the expense of others.