Being handy, which means being skillful or adept at doing things, may have a variety of antonyms. One antonym could be clumsy or awkward. Another could be inefficient or incompetent. A less negative antonym might be unskilled or inexperienced. Opposite terms such as inept, unhandy, fumbling, bumbling, and ham-fisted might also apply. Being unresourceful or incapable of completing tasks in a timely manner could fall within the opposite category of being handy as well. Overall, antonyms for being handy tend to imply a lack of skill, ability, or productivity in completing tasks.