a bootleg copy of TV shows or Movies or even games that are put on DVD's and are generally heavily compressed
and usually suffer from bad quality due to the pirate compressing them for more stuff to be on the disc.
sometimes , its not a Game or Show but rather a bunch of Viruses which means your screwed.
Bobby -"i just got this dvd from ebay but the quality is rat-shit but the seller claims its HD and Genuine"
Johnny - "wow you fell for it. you got a pirated dvd. just get the real thing and stop buying from ebay"