From DJ and deja vu, used ironically, DJ vu is the feeling one gets when one song is not followed by an expected song. DJ vu is frequently caused by frequent use of homemade mix tapes and compilation discs, leading the listener to expect specific sequences of songs in all situations.
other Co-worker: What was?
Co-worker: This song just started going round my head dude, and then it comes on the radio a second later.
other co-worker: DJ-vu