Loopy-Loopy dialogue: in which we become those two old guys from the muppet show

conversation, yesterday morning in bed:

me: What does "QT" stand for?
Loopy: huh?
me: You know, like "on the QT."
Loopy: What does that mean?
me: Like, hush-hush, a secret.
Loopy: You mean, "on the DL."
me: No, I know that one, but before there was DL there was QT.
Loopy: Well what does QT stand for?
me: That's what I'm asking you!

(fadeout amid laughter and tussling :) )