The term 'not thinking straight' can be summarized by two crossword solutions: 'WOOZY' (5 letters) and 'addleheaded' (11 letters). Both terms refer to a state of confusion or disorientation, often caused by intoxication or illness. 'WOOZY' is an adjective used to describe someone who is unsteady, lightheaded, or dizzy. 'Addleheaded' is an adjective used to describe someone who is confused, muddled, or foolish.