The phrase "bolloxed up" is a colloquial expression used to describe a situation that has gone awry or is in disarray. There are several synonyms that can be used in place of this phrase, including muddled, confused, disorganized, chaotic, messed up, and haphazard. These words all convey a sense of disorder or confusion and can be used in a variety of contexts, such as describing a failed project, a difficult situation, or a troubled relationship. When used appropriately, these synonyms can help add variety and nuance to your language, and convey your meaning more effectively.