breakbeat
break·beat / ˈbrekˌbit ; ˈbreɪkbi:t /noun U
1. a type of dance music that uses different patterns of sound based on one, two, or three beats in every BAR (=group of notes into which music can be divided), rather than the regular four beats in every bar碎拍音乐〔一种舞曲，它不是每小节四拍，而是一、二、三拍不等 〕