Soulja Boy Tell Em comes from American rapper Soulja Boy, whose full stage name includes the phrase and who used it as a repeated intro tag in his songs. He broke through online in 2007 with Crank That, spreading first through social platforms and file sharing before topping charts. The shout became inseparable from that early viral rap moment. It remains popular in edits and soundboards because a short, recognisable tag can instantly reference the era, the artist and an overconfident entrance without needing the full track.