The phrase "thick soup" refers to a type of soup that has a thicker consistency, usually because it has more ingredients or has been cooked for a longer time. It is not runny or watery like some other types of soup. Full definition
Great idea to blend up about half of the soup — I like thick soups, and often just reach in with an immersion blender to do just that! (vegkitchen.com)
My family tends to eat a lot of thick soups around this time of year, and along with that always comes the cornbread! (101cookbooks.com)
I cooked it for an hour and it is a very thick soup. (epicurious.com)