hiccup - An involuntary spasm of the diaphragm, resulting in a sudden, brief sound caused by a quick intake of air, often followed by a noticeable "hic" sound.
A girl in the class couldn't stop her hiccups, and the other kids in the class couldn't stop laughing.
compliant - Being willing to do what one is asked to do, following set of rules, regulations, and standards.
Though most people don't enjoy paying taxes, they are compliant either because they feel it is right, or because they fear getting caught if they cheat.