on the down-low

Prepositional phrase

US euphemistic idiomatic slang

(US, idiomatic, slang, euphemistic) In secret. / (US, idiomatic, slang, euphemistic) Secretly sleeping with someone other than one's partner.

Japanese Meaning

秘密裏に / パートナー以外の人と内密に不倫関係を持つ

She kept their relationship on the down-low to avoid gossip at work.

彼女は職場での噂を避けるために、二人の関係をこっそりと隠していた。

Sense（1）

(US, idiomatic, slang, euphemistic) In secret.

I'll tell you, but keep it on the down-low.

Sense（2）

(US, idiomatic, slang, euphemistic) Secretly sleeping with someone other than one's partner.

Sense（3）

(African-American Vernacular, LGBT) (of a male) Publicly identifying as heterosexual but secretly having sex with other men.