Определение to gazump в Английский Язык Английский Язык словарь
To raise the selling price of something (especially property) after previously agreeing to a lower one
{f} raise the price of something (usually real estate or land) after a lower price has been agreed on; overcharge; rip off; ask for a price that is not reasonable
If you are gazumped by someone, they agree to sell their house to you, but then sell it to someone else who offers to pay a higher price. In France you cannot be gazumped + gazumping ga·zump·ing During the 1980s property boom, gazumping was common. if you are gazumped, the person who is selling you a house sells it to another person who offers them more money