That's a Rack was released by American rapper Lil Uzi Vert in April 2019 as a standalone single alongside Sanguine Paradise, and later appeared on his 2020 album Eternal Atake. The phrase rack is slang for a stack of money, usually a thousand dollars, which fits the song's themes of wealth and status. Clips of the hook circulated on TikTok, YouTube edits and soundboards, where the short vocal became a ready made reaction for flexing, shopping hauls and luxury reveals online.