Scalper — One who, or that which, scalps.
Scalper — Same as Scalping iron, under Scalping.
Scalper — A broker who, dealing on his own account, tries to get a small and quick profit from slight fluctuations of the market.
Scalper — A person who buys and sells the unused parts of railroad tickets.
Scalper — A person who buys tickets for entertainment or sports events and sells them at a profit, often at a much higher price. Also, ticket scalper.