Lock, stock and barrel is an idiom that refers to the complete or total package of something or someone. In terms of antonyms, the opposite of lock, stock and barrel would be partial, incomplete, or fragmentary. It could also be described as a limited or reduced version of something or someone. This antonym highlights the incomplete or lacking nature of a partial or fragmentary thing, which is opposite of the comprehensive or whole nature of lock, stock and barrel. Other antonyms of lock, stock and barrel could include specific, partial, or patchwork, which all describe something that is not all-encompassing, but rather a specific or limited part.