v.tr. (also absol.) Brit. colloq. 1 (of a seller) raise the price of a property after having accepted an offer by (an intending buyer). 2 swindle. øøgazumper n. [20th c.: orig. uncert.]
GAZUMP
Meaning of GAZUMP in English
English main colloquial, spoken dictionary. Английский основной разговорный словарь. 2012