A connoisseur (French traditional, pre-1835, spelling of connaisseur, from Middle-French connoistre, then connaître meaning 'to be acquainted with' or 'to know somebody/something') is a person who has a great deal of knowledge about the fine arts; who is a keen appreciator of cuisines, fine wines, and other gourmet products; or who is an expert judge in matters of taste. In many areas, the term now has an air of pretension, and may be used in a partly ironic sense.
https://en.wikipedia.org/wiki/Connoisseur