The term 'BO-O-O-RING!' can be broken down into three crossword solutions: YAWN (4 letters), BLAH (4 letters), and SNORE (5 letters). Yawning is a reflexive action that occurs when a person is tired or bored. It is often accompanied by an open mouth and deep inhalation of breath. BLAH is an informal expression used to express boredom, apathy, or lack of enthusiasm. SNORE is a sound made when a person is sleeping, usually due to a blocked airway. It is often associated with sleep deprivation or fatigue.