upsell
verbUK /ˈʌpsel/
US /ˈʌpsel/
To upsell means to get someone to buy something bigger or better than what they first wanted.
The waiter tried to upsell us a larger pizza with extra cheese.
OTHER MEANINGS
2. To persuade a customer to add extra items to a purchase.
The cashier upsold a bag of fries with the burger.
3. An attempt to sell a more expensive version of a product.
The upsell at the phone shop was a fancier model with more storage.
4. To encourage someone to spend more than they planned.
The car dealer upsold her a car with leather seats.