Nobody, but nobody, crosses me and gets away with it.
6. conj. (following a negative clause or sentence) On the contrary, but rather (introducing a word or clause that contrasts with or contradicts the preceding clause or sentence without the negation).
I am not rich but (I am) poor; not John but Peter went there.
7. conj. However, although, nevertheless, on the other hand (implies that the following clause is contrary to prior belief or contrasts with or contradicts the preceding clause or sentence).
She is very old but still attractive.
You told me I could do that, but she said that I could not.
8. conj. Except that (introducing a subordinate clause which qualifies a negative statement); also, with omission of the subject of the subordinate clause, acting as a negative relative, "except one that", "ex
I cannot but feel offended.
9. conj. (archaic) Without its also being the case that; unless that (introducing a necessary concomitant).