a condition of perfect happiness, euphoria. Probably derives as a variation of CLOUD SEVEN; possibly from US weather forecasting terminology which divides clouds into nine types, the highest being number nine; or, less likely, a spiritual possibility: of the ten names for Buddha, the ninth is 'enlightened one'. It is probable that the US radio adventure series Johnny Dollar, 1949–62, popularised the term's usage US, 1935.

MDMA, the recreational drug best known as ecstasy. From the blissed-out state UK, 2003.

crack cocaine US, 1994