The term GAG REFLEX is a physiological response that occurs when something touches the back of the throat, tongue, or roof of the mouth. This REFLEX causes a person to involuntarily make a choking sound or LAUGH. The crossword solutions for this term are LAUGH (5 letters), HAHA (4 letters), HAHAHA (6 letters), HAHHAH (6 letters), and HOHOHOHOHOHOHO (14 letters). These words all represent different ways of expressing laughter, which is the response to the GAG REFLEX.