Breakdancing, also called breaking or b-boying/b-girling, is an athletic style of street dance originating from the African American and hispanic and Latino communities in the United States. While diverse in the amount of variation available in the dance, breakdancing mainly consists of four kinds of movement: toprock, downrock, power moves and freezes. Breakdancing is typically set to songs containing drum breaks, especially in hip-hop, funk, soul music and breakbeat music, although modern trends allow for much wider varieties of music along certain ranges of tempo and beat patterns.

The modern dance elements of breakdancing originated among the poor youth of New York during the early 1970s, where it was introduced as breaking. It is closely attributed to the birth of hip-hop, as DJs developed rhythmic breaks for dancers. The dance form has since expanded globally, with an array of organizations and independent competitions supporting its growth. Breaking will now be featured as an Olympic sport, making its debut in the 2024 Paris Summer Olympics.

A practitioner of this dance is called a b-boy, b-girl, breakdancer or breaker. Although the term "breakdance" is frequently used to refer to the dance in popular culture and in the mainstream entertainment industry, "b-boying" and "breaking" were the original terms and are preferred by the majority of the pioneers and most notable practitioners.