The antonyms for the word "diddle daddled" can be expressed as promptly, swiftly, expeditiously, immediately, without delay, rapidly, hastily, instantaneously, quickly, briskly, rapidly, instantly, and instantly. These words are opposite in meaning to "diddle daddled," which means to waste time or procrastinate. Therefore, if you want to convey a sense of urgency or efficiency, then you can use these antonyms in your writing or speech. By using these words, you can make your message clearer and more effective, whether you are addressing a group of people or communicating with someone one-on-one.