scalper

noun7

1. •
   One who scalps, or removes the scalp of another.

   • Denouncing representations of hostile Indians as vicious scalpers of innocent settlers […] — 2013
2. •
   (US, Canada) One who scalps tickets to popular entertainment events: buying them in advance and then selling them (e.g. online or just outside the venue of the event), often at inflated prices.

   • We could see three different scalpers moving through the crowd outside the arena, each muttering the characteristic refrain: “Need any tickets?”
3. •
   One who scalps any other item with limited availability.
4. •
   A person on an open outcry exchange trading floor who buys and sells rapidly for his or her own account, aiming to buy from a seller and a little later sell to a buyer, making a small profit from the difference (roughly the amount of the bid/offer spread, or less).
5. •
   A gambler who scalps.

   • The only sure thing about scalping the Series today is that the scalper is paying the bookie a greater profit because he is making a greater number of bets. — 1961
6. •
   A machine for removing the ends of grain, such as wheat or rye, or for separating the different grades of broken wheat, semolina, etc.
7. •
   A surgical instrument for scraping carious bones.