Down-low (also "on the down low" or "on the DL") may refer to any activity or relationship kept discreet. It may refer to:
- Down-low (sexual slang), Black men who identify as heterosexual but secretly have sex with other men
In music, Down low can refer to:
- Down Low (rap group), rap/hip hop group
- "Down Low (Nobody Has to Know)", the R. Kelly song
- Down Low (album), the Betzefer album
- "On The DL", The Pharcyde song
- "The Down Low", Episode 11, Season 6 of House M.D.