The phrase "lets have it" is typically used to indicate a desire for someone to deliver or present something. Antonyms of this phrase may include phrases like "let it be," "refrain from sharing," "keep to yourself," or "hold back." These phrases indicate that the speaker does not want or need the information or item being offered. Other antonyms may include phrases like "let it go," "put it aside," or "move on," which indicate a desire to release or forget about the subject at hand. Ultimately, the antonyms of "lets have it" reflect a desire for privacy, restraint, or disinterest.