look up any word, like the eiffel tower:
Describing something that was considered by many to be good, incredible, amazing, work of art, etc, that was never completed and will likely never be completed.
I honestly think Hitchhiker's guide to the galaxy was the greatest plav in history next to the Canterbury tales of course.
by slacker-chan June 21, 2010
Newton discovered Plav, and it w as named as such under new science
by fsmetal March 07, 2011