(n): a room in which things are stored
(n): a teashop where students in British universities can purchase light meals
(n): a restaurant where tea and light meals are available
(adj): unpleasantly and excessively suave or ingratiating in manner or speech
(adj): vs. sincere) -- (lacking sincerity
(adj): resembling or containing or spread with butter
(adj): vs. nonfat), fat -- (containing or composed of fat
I don't know for sure, but that's a fairly reasonable assumption. I'll see what I can find when I have more time.
Edit: Here's what OED says about its etymology:
"app. a. OF. boterie = bouteillerie (Godef.):late L. botria, f. bota, var. of butta cask, bottle; see BUTT n.5 The transition from the sense of ‘store-room for liquor’ to that of ‘store-room for provisions generally’ is in accordance with analogy, but may have been helped by association with BUTTER n.1."
So you were right. :)
C_b, I'm guessing this comes from "butt" meaning cask. Do you know whether that's the case?
In castles, the room where wine was dispensed from barrels. Usually located between the hall and the kitchen. A store room for provisions.