There are many synonyms for the phrase "taking the lid off," which typically means revealing or exposing something that was previously hidden or unknown. Some similar expressions include "uncovering," "revealing," "disclosing," "unveiling," and "exposing." These phrases all imply a sense of revelation or discovery, and are often used in a metaphorical or figurative sense rather than a literal one. Other more specific synonyms might include "unmasking," "untangling," or "unpacking," all of which suggest a more complex or multi-layered process of revealing or exploring something. Regardless of the specific wording used, however, taking the lid off something can be a powerful way to gain new insights or understanding.