Green’s Dictionary of Slang

bliss out v.

[coined/introduced by followers of Maharaj Ji, c.1972]

1. to experience a state of (usu. drug- or meditation-induced) ecstasy; thus blissing out/blissout n., a state of ecstasy; thus blissed (out) adj.

[US]Newsweek 19 Nov. 157: Initiates learn to see a dazzling white light, hear celestial music, feel ecstatic vibrations [...] The process is called ‘blissing out’.
[US]J. Wambaugh Golden Orange (1991) 151: Can’t you jist see me all blissed out over a new study on slime moulds?
[Aus]T. Winton Human Torpedo 122: I look at seventeen year olds [...] and they don’t looked so blissed that I suddenly want to be like them.
[UK]N. Cohn Yes We have No 158: Still flailing their arms and blissing out.
[UK]Guardian Guide 26 June–2 July 5: A bit too blissed out on that yoga.

2. by ext., pleasurably intoxicated by narcotic drugs; thus blissed-out/blisted adj.

[US]J. Stahl Permanent Midnight 179: When I was loaded and blissed-out enough to emerge [etc.].
[US]L. Stavsky et al. A2Z 8/2: blisted – high on a smoked drug: He was blisted on that blunt for hours.