The term 'Hoot and a Half' is a phrase used to describe something that is very loud or exciting. The crossword solutions for this term are GAS (3 letters) and RIOT (4 letters). GAS is an abbreviation for gasoline, which is a flammable liquid that is used as fuel in many vehicles. RIOT is a noun that refers to a violent disturbance of the peace by a large group of people. Together, these two words can be used to describe a loud and chaotic situation.