The phrase "pouring it on" generally means to apply maximum effort, energy or enthusiasm to a task. Therefore, antonyms for this phrase may include terms such as dulling or slowing down. If one wants to convey a less intense approach to a task, words such as easing up, taking it easy or being more relaxed may be used. Other antonyms for "pouring it on" could include being laid back, taking a more leisurely approach or even procrastinating. Ultimately, the antonyms that one chooses will depend on the context in which the phrase is being used and the message that the speaker wishes to convey.