The term 'What Was I Thinking?' can be solved in a crossword puzzle with the answers DOH (3 letters), SILLYME (7 letters), and STUPIDME (8 letters). This phrase is often used when someone realizes they have done something foolish or made a mistake. The word DOH is an interjection used to express surprise, frustration, or dismay. SILLYME and STUPIDME are both self-deprecating terms used to describe one's own foolishness.