Antonyms for the phrase "gussies up" refer to actions that are the opposite of dressing up or making something look more fancy or attractive. Words that convey this opposite meaning could include plain or ordinary, unkempt, rough-hewn, shabby, or even uncivilized. While "gussies up" may indicate an effort to glamorize or enhance an object's appearance, antonyms indicate a disregard for superficiality and a focus on recognizing beauty in its natural form. Such antonyms emphasize the virtues of minimalism, simplicity, and authenticity - qualities that prioritize substance over style. By recognizing these antonyms, we can expand our vocabulary and express ourselves in a more nuanced and accurate way.