a tropical tree which bears edible plum-like fruit, in particular:
a Caribbean tree with yellow fruit (Spondias mombin, family Anacardiaceae).( American hog plum) an American tree with bitter fruit and timber that is used as a sandalwood substitute (Ximenia americana, family Olacaceae).
late 17th century: so named because the fruit is common food for hogs in the West Indies and Brazil
hog plum in other Oxford dictionaries
Definition of hog plum in the US English dictionary