(房价议定后因有人出价更高而)对…食言毁约 when sb who has made an offer to pay a particular price for a house and who has had this offer accepted is gazumped , their offer is no longer accepted by the person selling the house, because sb else has made a higher offer
VERB (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.
In France you cannot be gazumped... 在法国买房不会出现抬价毁约的情况。