gazump
v.— «It’s called “gazumping” in England, the process by which someone selling a piece of property accepts an offer from one buyer, maybe even going so far as to shake hands on it, then quickly—and often surreptitiously—accepts another, higher, offer from a second buyer, leaving the first buyer with his pockets agape and his heart broken. Gazump is a glorious, full-bodied word, with a lusty feel in the mouth; the behavior it outlines, however, is anything but satisfying.» —“The Golden Rule Is Taking a Beating” by Penelope Green New York Times June 27, 2004. (source: Double-Tongued Dictionary)