Fouled up is a common phrase used to describe when something goes wrong or becomes muddled. However, there are several other synonyms that can be used to describe this same situation. For instance, the phrase "botched up" can be used to describe a situation where something was done poorly resulting in negative consequences. Other synonyms include "messed up", "screwed up", "mucked up", "flubbed", and "bungled". All of these synonyms are interchangeable with the phrase "fouled up" and can be used to describe situations where something has gone awry or has not been executed properly.