Dijon Isaiah McFarlane (June 5, 1990), professionally known as Mustard, is an American record producer and DJ from Los Angeles, California. He is best known for being the DJ of Compton rapper YG, but recently came to prominence producing a number of hit singles for artists such as Tyga, 2 Chainz, T.I., Will.i.am, Wiz Khalifa, Fergie and many others.