a state of intoxication where the said "drunk" person did not have a sip of alcohol but seems to be in an intoxicated state. Mostly prevalent in the Irish or Celtic people because of their inherited ability to absorb alcohol from the air, with a high enough concentration.
At the wedding, young Patrick and Bridget seemed to be drunk even though they could not possibly be. Aunt Eileen nudged her husband and said "must be the second-hand drunkness."
by Bridget Boyle September 29, 2007