The phrase "blew lid off" typically refers to exposing a secret or revealing the truth about something. Antonyms for this phrase may include "concealed," "covered up," "hid," or "kept under wraps." These antonyms imply that the truth about a particular situation or secret has not been uncovered or revealed. Other antonyms may include "missed," "overlooked," or "ignored," suggesting that important details or information were not noticed or taken into account. While "blew lid off" implies a sense of explosive revelation, its antonyms convey a sense of secrecy, omission or ignorance.