This is a grab bag of various slang words and expressions used by Americans in literature song and daily conversation.
AIR BAGS: the lungs. Fill your air bags well when we go for a walk in the woods. He is the best runner in the class but the his air bags are larger than most.
BETTER HALF: usually refers to one's wife, sometimes one's husband. This is my better half, Sally. I'd like to go with our group but my better half won't let me out of the house.