1. QT is an abbreviation used in online chat rooms or in text messaging to mean “cutie”.
2. QT is a slang abbreviation for quiet.
3. The expression “on the QT” means “secret” or “between you and me”.
The phrase gained fame and fortune in the film “LA Confidential”, where Sid Hudgens, the character played by Danny DeVito, signs off his newspaper columns with “off the record, on the QT and very hush-hush.”.
“He told me about the deal strictly on the QT!”