upon the tapis en · ADP
Etymology
Compare French mettre sur le tapis.
Meanings
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(idiomatic) Under discussion or consideration.
[…] when any thing was supposed to be upon the tapis worth knowing or listening to, it was the rule to leave the door, not absolutely shut, but somewhat ajar […]
1759–1767, [Laurence Sterne], The Life and Opinions of Tristram Shandy, Gentleman, volume (please specify |volume=I to IX), London: […] T. Becket and P. A. Dehondt, […]:Of this, however, I was not aware; although, in the present instance, I saw clearly that something of a whimsical nature was upon the tapis with my friend, and that Hermann was its especial object.
1837, Edgar Allan Poe, Mystification: