(one) is on the DL

(one) is on the DL

1. slang Said of a man who has sex with other men but considers himself to be heterosexual. In this usage, "DL" is a shortening of "down low," referring to a state of secrecy or minimal public knowledge pertaining to these sexual activities. I never thought he was gay, but then I started to hear rumors that he's on the DL.
2. One cannot currently play a sport due to an injury. In this usage, "DL" is a shortening of "disabled list," which, in sports, is a list of injured players. Well, our two best players are on the DL, so I'd say our playoff chances are looking grim.
See also: dl, on
Farlex Dictionary of Idioms.
See also:
  • prostie
  • prosties
  • sesh
  • reg
  • cig
  • cuz
  • clitty
  • frag
  • fragged
  • perking