This is a “fun” subject. Supervocalics are, says Eric W. Chaikin, “a word, phrase, or proper noun which contains A,E,I,O,U once each, but no Y.”
Neville Fogarty says “Supervocalic is an adjective describing a word or phrase containing each of the five vowels — A, E, I, O and U — exactly once. Examples include: sequoia, ambidextrous, and Julia Roberts.”
In any event, it can mean some enjoyable time spent around a table.