on the quiet
Confidentially; secretly; without anyone else knowing. Please keep this information on the quiet until we are ready to make a public announcement. It turns out he's been writing a romance novel on the quiet.
on the ˈquiet
(also on the q.t. old-fashioned) (informal) without telling anyone; secretly: Well, just on the quiet, she’s actually leaving her job next month. Don’t tell anyone, will you?Just remember that whatever I tell you is on the q.t. Q.t. is an abbreviation of ‘quiet’.