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- on the Q.T.
on the Q.T.
on the Q.T.
Secretly, as in They told her on the Q.T. that she was being promoted. This slangy term, in which Q.T. is an abbreviation for "quiet," was first recorded in 1884.
on the Q.T.
Confidentially. “Q.T.” is simply a shortened form of the word “quiet.” You're being told something on the Q.T. is to be asked to keep it under your hat.