From the word itself exotic you can already picture in your mind what king of food it is.
EXOTIC means unusual and different, foreign but exciting. It is a positive word, and usually connotates beauty and wonder as much well as strangeness.
so an Exotic Food is a unusual and different food which is not popular in you place. It is so strange that you cant think that is edible to eat. Here are some picture of exotic foods in the Philippines.
It really doesn't look good right? Its the difference of exotic foods and gourmet foods, its not the appearance, its the taste.