| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a chattering or flighty, light-headed person. |
laughing gas laugh·ing gas (lāf'ĭng)
n.
Nitrous oxide, especially as used as an anesthetic.
| laughing gas (lāf'ĭng) Pronunciation Key
Nitrous oxide used as a mild anesthetic. |