187 is the police code for a murder or killing. This song “187” is Lil Uzi & A$AP Ant killing it.
This song is the first collab between A$AP & Uzi.
Lil Uzi Vert has collaborated with A$AP mob on “New Level (Remix)” and with A$AP Ferg on “Uzi Gang,” & they were both featured on “WDYW.” Uzi also collabed with A$AP Ant on “Whippin'”.