Green’s Dictionary of Slang

a phr. of rejection/ignorance: I don’t know, don’t ask me; also as n., a pass.

1996		(con. 1949) G. Pelecanos Big Blowdown (1999) ‘What do you hear around on the hooker murders?’ ‘Pasadeno. It’s like I said, I don’t know nothin’, officer.’.
2006		M. Karp Rabbit Factory (2007) 51: At noon Curry wanted us to break bread in the executive dining room. We took a Pasadena.