What is nitrous oxide commonly referred to as?

Nitrous oxide is commonly referred to as "laughing gas" due to its euphoric effects when inhaled. This nickname comes from the gas's ability to induce a state of giddiness and joy, which is often accompanied by laughter during its use. It is frequently employed in dental procedures and some medical practices as a sedative and anesthetic agent. The other options do not correspond to common names used for nitrous oxide; "balloon gas" may refer to the use of helium or other gases in balloons, "freon" refers to a class of refrigerants, and "chill gas" is not a recognized term associated with nitrous oxide. Thus, "laughing gas" is the most accurate and widely recognized term for nitrous oxide in both medical and recreational contexts.