AllMusic Review by Andy Kellman [+] His first compilation, The Definition of X: Pick of the Litter, contains all but five of the charting singles predating Year of the Dog.Again, sticking to necessary material for the casual fan: the rallying calls ('Ruff Ryders' Anthem,' 'Get at Me Dog,' 'What's My Name'), the venomous rants. DMX - The Definition of X: The Pick of the Litter [Vinyl] - Amazon.com Music. So now I have both new jewel cases of this album sitting in a zip-loc bag together. The Definition of X: Pick of the Litter, a Compilation of songs by DMX. Released June 12, 2007 on Def Jam (catalog no. B0008988-02; CD). Genres: East Coast Hip Hop, Hardcore Hip Hop. Rated #210 in the best compilations of 2007, and #7411 in the greatest all-time compilation chart (according to RYM users).