look up any word, like cleveland steamer:
 
1.
A small internet fad created when a Pirates of the Carribean 2 fan created a song from the famous POTC2 phrase, "...come to negotiate, you slimy git? Look what I've got. I've got a jar of dirt! I've got a jar of dirt! And guess what's inside it..." said by the character Jack Sparrow. The main centre for this fad is the site YTMND, although many videos for the song "I've Got a Jar of Dirt Remix" have been uploaded to Youtube.
Did you see the latest Jar of Dirt YTMND?

No, but I just watched one of the song videos.
by P A Smith September 01, 2007
 
2.
Item(s) given with promise of applicable necessity that ultimately becomes useless;
"The door was nailed shut, so the screwdriver was a jar of dirt"
by LanceCriminal July 27, 2006
 
3.
A common slang term for AIDS. Usually contracted by Pirate-Loving teenage girls.
Jackie just got the Jar of Dirt from that pirate Jack Sparrow!
by Pedophile Santa June 02, 2011