vulgar substitution

Main Entry: vul·gar substitution
Pronunciation: 'v&l-g&r-
Function: noun
Etymology: French substitution vulgaire, from Latin substitutio vulgaris, literally, ordinary substitution, as distinguished from substitutio pupillaris substitution of an heir in place of a minor who actually receives the testamentary gift but dies before reaching the age of majority
in the civil law of Louisiana : a testamentary disposition in which the person making the will names another person to take the gift in the event that the instituted heir does not accept it or is already deceased