The phrase "mucking up" refers to making a mess, causing confusion, or making a mistake. Therefore, some antonyms for this phrase would include terms like "tidying up," "organizing," "clarifying," "streamlining," "correcting," and "improving." These actions involve cleaning up a mess, making things simpler, and enhancing the situation. Other antonyms could include "succeeding," "achieving," "nailing it," or "doing well," as these phrases refer to performing something skillfully and effectively. Antonyms for "mucking up" are words that reflect the opposite of creating chaos or disorder and instead denote being organized, efficient, and successful.