To unfairly raise the price of something, especially a house, after agreeing to a lower price; British English term.
Origin obscure, possibly from Yiddish or British slang. The term emerged in British real estate in the late 20th century to describe unethical pricing tactics.
Gazumping became so common during 1980s British property booms that it actually became a cultural obsession—there are TV shows and news cycles dedicated to it!
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