The term "most celeb" pertains to the most famous or popular celebrity. However, if one wants to describe the opposite, there are several antonyms to consider. Some suitable antonyms for most celeb could include "unknown," "obscure," "unrecognized," "unpopular," and "unacknowledged." These words refer to individuals who are not well-known or famous, lacking recognition and attention from the public. They are not extensively publicized in the media nor admired by many people. Another antonym could also be "least celeb," which refers to the least famous or popular of all. Hence, when describing a celebrity who lacks in fame or popularity, using these suitable antonyms can add a different tone to the description.