The line is Metro Boomin's best-known producer tag, performed by rapper Future, with 'Young Metro' referring to Metro himself. It gained wide attention in 2015 through Drake and Future's 'Jumpman' from What a Time to Be Alive, then appeared across other major hip-hop releases and became shorthand for the producer's presence on a track. As it spread beyond rap into edits, sports clips and social media posts, the warning detached from the songs and became a reusable reaction for distrust, disloyalty or an incoming joke at someone's expense.