TALK A BIG GAME is an idiom which means to make exaggerated claims or promises. This phrase is often used to describe someone who brags or boasts about their abilities, possessions, or accomplishments. The crossword solutions for this term are BRAG (4 letters) and BOAST (5 letters). Bragging and boasting are both forms of self-promotion, where a person talks up their own qualities or achievements in order to gain admiration or respect.