The crossword solution for the term DISMISS CASUALLY, WITH 'AT' is SNEEZE. The term 'sneeze' is an action that is done when a person involuntarily expels air from their nose and mouth due to irritation in the nasal cavity. It is often accompanied by a sound and can be caused by allergies, colds, or other irritants. The phrase 'dismiss casually, with 'AT'' is often used to describe the act of sneezing, as it is a casual and involuntary action.