The story
After rapper T.I.'s album Trap Muzik (2003), dealing with themes of street life and drug dealing. See trap (“a place where drugs are sold”).
Etymology from Wiktionary, CC BY-SA 4.0.
trap music
Today it means: A subgenre of hip-hop that originated in the early 1990s in the southern United States, typified by bleak themes, aggressive lyrics, and distinctive synthesizers and drums. Full definition →