1 definition by Liz Fox

nos

New Zealand/Brit. slang: Nitrous Oxide, also under the aliases "Laughing Gas" and "Hippy Crack", which give euphoria for a short period of time, taken via balloons that are blown up with the gas and then inhaled.

"Oh man, the first time William had some nos he just sat there and grinned for thirty seconds."

by Liz Fox May 12, 2005