An action or person that embodies excellence, or very good in nature. While being known as swell in the 1980's may have been a condescending or derogatory term, swelladelic is a positive term coined to incite positive feedback.
"That wave was swelladelic" or "She is lookingquite swelladelic this evening"
Any substance with Oneirogenic effects; producing twilight sleep, hypnogaugia, lucid dreaming, intense visions, or euphoria during repose, but which have little or no effect on an alert wakeful consciousness.
"That stuff I orderedonline didn't do much for me until I fell asleep-- and man was it ever sleepadelic!"