Short for "down low". Down-low is an African American slang term that typically refers to a subculture of black men who usually identify as heterosexual, but who have sex with men; some avoid sharing this information even if they have female sexual partner(s) married or single. The term is also used to refer to a related sexual identity.

secret, hidden, not telling anyone but someone you absolutely trust
"I never meant to, but I did though
I gotta keep it on the d-low
Then again, what the fuck do I know
You're always on my mind so
Felt good but now I feel bad
I think I know I can't take it back
No, there's nothin' I can say"

-Zayn Malik in "Too Much"

"I can't believe Zayn and Harry are together. They must keep it on the d low."

"Since Zayn is with Gigi he has to keep it on the d low."
by might as well be roses August 2, 2018
DL "Down Low" hidden, concealed secretive. However, recently "DL" is used to refer to covert male homosexual activity. specfically in the Black community.An "urban comtemporary" version of "In the closet"
I feel bad for Jane/Tamika she's about to have Dick's/Jamal's baby. She doesn't know he's :In the closet/On the D low.
by ra ra January 4, 2008
an abbreviation of "down low", meaning to keep secret.
"ayy, keep tings on da d-low and ting. tell manz u get murkizzled"
by Snypa starrr August 7, 2005
an expression used to keep things secretive. d-low is short for down low.
yo keep that money on the d low, we dont need everybody knowing how much we have.
by low2behold March 16, 2006
A god among all life forms in all of existence
by DaaBootyybanditt November 26, 2020
1) Short for "down low."
2) Secretive or scandalous.
Yeh, he in love...But do he know she doin his brother, too? (kee kee keek!)
by Joshiro007 February 18, 2003
keepin sumthin quiet/ not telling anyone
girl:'i did tings wiv shawn, bt he dnt wnt no1 noin so keep it on the d-low yeh?'
boy: 'seen yeh thts kl'
by beetoy January 2, 2006