Flexing', also called Bone Breaking, is a style of street dance from Brooklyn, New York that is characterized by rhythmic contortionist movement combined with waving, tutting, and gliding. Flex dancers, referred to as flexors, often perform shirtless and incorporate hat tricks in their performance for showmanship.
Flexing is primarily performed to hip-hop music but it did not come from hip-hop dance or hip-hop culture. It evolved from a Jamaican style of street dance called bruk-up which is performed to dancehall and reggae music. In a 2009 interview with WireTap magazine, dancer Stefan "Mr. Wiggles" Clemente described bruk-up as a reggae style of popping.
Flexing has been performed on the third season of America's Best Dance Crew (ABDC), on the second season of The LXD, and at theGuggenheim Museum as part of the YouTube Play event. In 2011, the Huffington Post published a brief news article on the dance. In 2013, NextLevelSquad performed flexing at Breakin' Convention and Adedamola "Ringmaster Nugget" Orisagbemi performed flexing at the Vail International Dance Festival.
The 2013 independent film Flex Is Kings documents the lives of several flexors over a two-year period leading up to a dance competition called BattleFest. Flex Is Kings was screened at the Tribeca Film Festival. Flexing was also the subject of a French online dance show called "Puma the Quest". In 2014, The New Yorker published a seven-page article about flex dancer Saalim "Storyboard P" Muslim.