it is someone competent to pass critical judgment. I.E an expert.
'Connoisseur' means to be a person with extensive knowledge, especially of the fine arts; a person with refinded taste.A connoisseur is someone that is well-versed and knowledgeable in a field (of...
A person with expert knowledge or training, especially in the fine arts or cooking or wine.
a duck
A food connoisseur is someone who likes, understands and knows a lot about food.