v. To attempt to persuade a customer to purchase a more expensive item.

Example Citation:
"Theater staffs have developed the technique of 'upselling,' or convincing patrons to buy larger sizes of popcorn and drinks for a discount. Kathy Warning, UA's director of food services, says she recommends trying to upsell to about half the customers."
—Dave McNary, "Popcorn Power," Pittsburgh Post-Gazette

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