transitive verb
Definition 1
Take into account, consider, in addition, also.
Source: Invertext
Context: A Robin Hood-themed family visit to Nottinghamshire is worthwhile when it includes such outdoor entertainment as archery, medieval mêlées or forest walks. Throw in a restaurant meal and art gallery and you have the basis for a pleasant weekend break.
Source: Financial Times 08/05/2010 (Jonathan Guthrie)
Definition 2
Of the seller of a product or package, add (discounts, gifts, fringe benefits, etc.) as extra incentives.
Source: Invertext
Context: "Housebuilders have had more interest than they would naturally get because they can throw in incentives that estate agents selling second-hand property cannot."
Source: Financial Times 07/04/2010 (Claer Barrett, quoting Robin Hardy, real estate analyst at KBC Peel Hunt)