Definition of "roaster"

roaster

noun
plural roasters
1. Someone who roasts food or coffee beans.
  Quotations
  […] they [professional cooks] had as many as 25 helpers, such as saucerers, larders, roasters, pottagers, bakers, spicers, and fruiterers, not to mention spit turners and scullions.
  2011, Ruth A. Johnston, All Things Medieval: An Encyclopedia of the Medieval World
2. (cooking) A kitchen utensil used for roasting.
3. A chicken, pig, etc. suitable for roasting.
4. A furnace used in making ball soda.
5. One who roasts or banters, especially as a comedy routine.
  Quotations
  There is nothing I would like more than for a young wise guy or wise gal to study my teachings and learn from my experiences in order to become America's next great roaster.
  2009, Jeffrey Ross, I Only Roast the Ones I Love: Busting Balls Without Burning Bridges
6. (planetology, informal) A hot Jupiter.
7. (Scotland, slang, derogatory) An objectionable person; somebody making a fool of themselves.