Simple past tense and past participle of gazump.(verb)
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Use "gazumped" in a sentence
"THE Green Party leadership was accused yesterday of being "gazumped" by Fianna Fail over its failure to deliver a public inquiry into the banking crisis."
"Under the terms of a complicated and fraught negotiation, Chelsea had to pay £12mof his fee to a gazumped United, who will have felt a great deal less chagrined after Mikel's undistinguished performance here, one of many which have undermined the claims made on his behalf during his teenage years."
"On the upside, you can't be gazumped at the end of the buying process, like in the U.K."