donald
n. countablen. a person who is easily fooled or tricked. It is a very old-fashioned slang word that people rarely use today.
n. a person who is easily deceived or cheated; a dupe. This sense is largely archaic or dialectal in modern English usage.
The street performer looked for a donald to trick.
In the old stories of the city's underworld, a donald was the perfect target for a simple card game scam.
While the term has largely vanished from the modern lexicon, nineteenth-century slang dictionaries define a donald as a gullible individual ripe for exploitation by more cynical urban residents.
Name of Scottish kings and an early saint, from Scottish Gaelic Dòmhnall and reinforced by Medieval Latin Donvaldus ~ Donaldus, from Old Irish Domnall, from Proto-Celtic *Dubnowalos (“prince / chief of the world”). Doublet of Domhnall.
Primarily used as a proper noun; the slang sense is extremely rare and considered archaic.