Wiktionary
n. A practical joke made using the telephone.
Wikipedia
A prank call (also known as a crank call) is a telephone practical joke. Prank phone calls began to gain a worldwide following since the invention of telephones, as they became a staple of the obscure and amusing cassette tapes traded among musicians, sound engineers, and media traders beginning in the late 1970s. Among the most famous and earliest recorded prank calls are the Tube Bar prank calls tapes, which centered on Louis "Red" Deutsch. Comedian Jerry Lewis was an incorrigible phone prankster, and recordings of his hijinks, dating from the 1960s and possibly earlier, still circulate to this day.
Very prominent people have fallen victim to prank callers, for example Elizabeth II, who was fooled by Canadian DJ Pierre Brassard posing as Canadian Prime Minister Jean Chrétien, asking her to record a speech in support of Canadian unity ahead of the 1995 Quebec referendum. Two other notable examples of prank calls were made by the Miami-based radio station Radio El Zol. In one, they telephoned Venezuelan president Hugo Chávez, and spoke to him pretending to be Cuban president Fidel Castro. They later reversed the prank, calling Castro and pretending to be Chávez. Castro began swearing at the pranksters live on air after they revealed themselves.
Usage examples of "prank call".
Perhaps this is some million-credit equivalent of a prank call to his old employer.
Sometimes a prank call only leads to a wild goose chase, but sometimes when the runner arrives they're waiting for her.