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gazump

[guh-zuhmp]British Slang.
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verb (used with object)
  1. to cheat (a house buyer) by raising the price, at the time a contract is to be signed, over the amount originally agreed upon.
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noun
  1. an act of gazumping.
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Origin of gazump

First recorded in 1925–30; earlier gazoomph to swindle, argot word of uncertain origin
Related formsga·zump·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for gazump

gazump

verb
  1. to raise the price of something, esp a house, after agreeing a price verbally with (an intending buyer)
  2. (tr) to swindle or overcharge
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noun
  1. the act or an instance of gazumping
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Derived Formsgazumper, noun

Word Origin

C20: of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012