1. （房价议定后因有人出高价而）对…食言，对…悔约
    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.

    e.g. In France you cannot be gazumped...
           在法国买房不会出现抬价毁约的情况。

1. raise the price of something after agreeing on a lower price

2. rip off
    ask an unreasonable price

    Synonym: overchargesoaksurchargefleeceplumepluckrobhook