Bad cess

From Born to Kill (dir. Robert Wise, 1947). Helen (Claire Trevor) has come to threaten Mrs. Kraft (Esther Howard): don’t go to the police, or else. Having issued her threat, she turns to leave. Mrs. Kraft follows her to the door:

“Wait — I’d be a bad hostess if I didn’t see you out.”

[She spits on Helen’s shoulder. Helen is unfazed. ]

“Bad cess to me?”

“No need for me to say it. You carry your own curse inside of ya.”

We thought we were mishearing it, but no. Merriam-Webster explains bad cess . M-W has it as chiefly Irish and dates it to 1808. The OED has it as Anglo-Irish, with a first citation from 1859. No relation to cesspool.