"Laid the gaff" is a nautical phrase that means to reveal a secret or to be caught in a lie. Some synonyms for this phrase include "spill the beans," "let the cat out of the bag," and "blow the whistle." Other similar expressions include "give the game away," "unveil the truth," "air out dirty laundry," and "expose the deception." These phrases imply that something hidden or undisclosed has been revealed, often unintentionally. It is crucial to stay truthful and honest in all situations to avoid being caught and "laying the gaff." Using these phrases appropriately can add variety and spice to one's conversations and writing.