Jumped on case can be interpreted in different ways, depending on the context. However, if we take the phrase literally, some antonyms can be considered. Instead of jumping on a case, one may avoid it, neglect or ignore it. If someone jumps off a case, they could be disengaging, disconnecting or distancing themselves from the situation. Alternatively, they could be stepping back, hesitating, or delaying their involvement. Antonyms for 'jump' and 'case' may also be explored, providing a broader range of contrasting words. These may include; crawl, tiptoe, descend, or float for jump, and puzzle, solution or answer for a case.