What is i be flossin?

"I be flossin'" is a phrase and dance move that gained popularity in 2018, particularly amongst children and teenagers. The dance consists of swinging one's arms and hips while alternating the position of one's fists. The phrase "I be flossin'" is said while performing the dance and is meant to convey a sense of confidence or boastfulness. The origin of the phrase and dance is unclear, but it is thought to have originated from the southern hip-hop scene. The trend has since faded in popularity, but continues to be referenced in popular culture.