Definitions
1.verbTo swindle; to extort.
2.verbTo raise the selling price of something (especially property) after previously agreeing to a lower one.
3.verbTo buy a property by bidding more than the price of an existing, accepted offer.
4.verbTo trump or preempt; to reap the benefit underhandedly from a situation that someone else has worked to create.
5.nounThe act of one who gazumps.