The phrase "banged out" can mean a few different things, such as completing a task quickly or forcefully. Antonyms for "banged out" might include phrases like "took their time," "methodically completed," or "slowly and carefully crafted." More specific antonyms might depend on the context in which "banged out" is used. For example, if "banged out" refers to creating a piece of music, an antonym might be "delicately composed." No matter the situation, antonyms for "banged out" typically involve a slower, more deliberate approach to the task at hand.