Well, I'll answer my own question. Just checked out good ol' OneLook and found this on MW:

One entry found for twee.


Main Entry: twee
Pronunciation: 'twE
Function: adjective
Etymology: baby-talk alteration of sweet
Date: 1905
chiefly British : affectedly or excessively dainty, delicate, cute, or quaint <such a theme might sound twee or corny -- Times Literary Supplement>

Now what was that prisms and prunes expression we were discussing a while back?