Originally meaning a random series of events or figures in a fantasy or dream like state.
Used now to define a night out, normally substance fuelled, that leads to lot's of strange, weird, wonderful and damn right crazy things taking place around you as you try, and fail, to make sense of exactly what is going on.
Man, last night was fucked up, as soon as we hit the club and I came up the whole thing became phantasmagorical. What the hell was that swedish dwarf doing on our drive with andrex tissue hanging out of her pussy?
The best word in the world, it is used to describe a group of mythical and fantasy creatures, or just top confuse people as most people have never heard it.
As he looked into the forest he saw all manner of Phantasmagoria.
or
instead of the insult your mum, ill screw ur phantasmagoria then walk off.
To experience flashing, unrelated images in frequent succession whilst in a spasmic state, such as having an orgasm or having a fit (often drug related).