A form which has become prevalent only with the internet,
& which resulted from not understanding that Billy Collins
was making fun of fixed-form poetry: the Paradelle.
No doubt someone this instant is seriously trying to follow
the Rules of Flarf...
[Reminds me of how zzxjoanw became extant*, after it was inserted
into a Maori dictionary by the lexicographer as a joke; similarly, i
believe, Lewis Turco invented the terzanelle to see if anyone would
write one--& they did.]

Another definition of "flarf" : snarky towards the idea of
Robert Lowell...

And let's not forget about scrytch.

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*i have used that word in poems, so it is now a "real word"...
According to this, in David Brin's novel Earth, there's a char-
acter who play that imaginary musical instrument...Ironically? Or not?
Who can say?