"Fudge up" is a colloquial term used to describe a mistake or error caused by negligence or carelessness. Synonyms for "fudge up" include "mess up," "blunder," "screw up," "botch," "bungling," "flub," "muddle," "muck up," and "bungle." These words are often used interchangeably to describe an action or situation that has gone wrong. To "fudge up" is to fail at something, whether it is a project, task, or responsibility. It is important to be mindful of our actions and strive for excellence to minimize the likelihood of fudging up. In the event that mistakes happen, it is important to acknowledge them, take responsibility, and work towards finding a solution.