gazump

动词 gazump:

1. rip off; ask an unreasonable price
   同义词：overcharge, soak, surcharge, fleece, plume, pluck, rob, hook
2. raise the price of something after agreeing on a lower price

1. We shan't be buying the house: we've been gazumped (by the owner).
   我们不想买那所房子了，卖主变卦要敲诈我们。