A foolish child, or idiot, left by fairies in place of another who is carried off by them; a dolt.
A foolish child left by the fairies in place of another: a dolt, an idiot.
There were Gerda and her brother and the oaf "Pagan Passions", Gordon Randall Garrett Laurence Mark Janifer
There were Gerda and her brother and the oaf
A long round piece of timber or iron tube, raised upright on the keel, through the decks, of a vessel to support the sails; any upright pole; the fruit of the oak, beech, etc., especially when used as food for swine. ...