1. People who engage in gazumping; sellers who raise the price of a property after agreeing to sell it at a lower price, or buyers who lower their offer after agreeing to a higher price.
Usage: British English; informal; plural form of gazumper

Examples

• The gazumpers withdrew from the deal at the last minute, demanding an extra £20,000.
• Real estate agents warned buyers to be cautious of gazumpers in a competitive market.
• Several gazumpers in the neighborhood caused delays in property transactions.
• The couple fell victim to gazumpers who suddenly increased their asking price.
• Gazumpers can create uncertainty and frustration in the home-buying process.