down-low

or down·low

[ doun-loh ]
/ ˈdaʊnˈloʊ /
Slang.

adjective

of or pertaining to men who secretly or discreetly have sex with other men: She once dated a down-low guy.

Idioms for down-low

    on the down low,
    1. (of a man) secretly or discreetly engaging in sex with other men.
    2. secret; discreet: Okay I'll tell you, but keep it on the down-low.

Origin of down-low

First recorded in 1990-95; down1 + low1