The portion of a track in which all the instruments drop out except the drums. Using two copies of the same record, DJs often extend or loop these portions to form the rhythmic basis of new tracks. Often used to describe the variety of musics that make use of breakbeats, e.g., HipHop, TripHop and drum ‘n’ bass.
(Source – Cox, C. and Warner, D. (2004) Audio Culture : Readings in Modern Music. Continuum.)