The DJ Diet, as it's commonly referred to among members of the EDM scene, consists of long periods of time without sleep, drugs as sustenance, and (usually extremely unhealthy) food whenever you're finally hungry, if it's around at all.
Obviously this is a very unhealthy way to live, but when one speaks of the DJ Diet, they do so with an ironic and undeserved sense of accomplishment and self-worth.
"Man, you look tired."
"Yea dude, been on the DJ Diet for like a week. Time for a cheeseburger and a nap, then it's back to work."