“Fulsome” comes from the Middle English “fulsom” or “foulsome,” meaning either “abundant, well-fed, or plump” or — quite a different usage — “arousing disgust.” The modern definitions of “fulsome” are just as disparate. It can be used in contexts of abundance or generosity, but it can also describe something morally or generally offensive. Similarly, it can describe effusive praise, but it can also be used when something is outside of the bounds of good taste. With “fulsome,” context clues are very important to determine the correct meaning of the word.