K.C.
I don't know if you've tried this, but when my son did that to me, my response would be to detach him, tell him "no", and put him down a couple feet away from me, all in quick succession so there'd be no question why he was being pushed away. He would scream like nobody's business for a couple of minutes, and during that time I would tell him not to bite mama, that he didn't like being put down and mama didn't like being bitten. I think we did that five times over a two day period, and no chomping after that.