Mustard, born Dijon McFarlane, rose in the early 2010s as the producer behind Tyga's Rack City and a string of West Coast club hits for YG, 2 Chainz and others. His spoken tag, voiced by YG at the start of tracks, became as recognisable as the sparse piano, handclaps and heavy bass of his productions. As those songs spread through radio and later short form video edits, the tag detached from the original records and became a standalone shorthand online for a beat about to hit hard.