What would Cindy and Jim Walsh think? Former Beverly Hills, 90210 studmuffin Jason Priestley had Fox sensors scrambling yesterday when he blurted out the granddaddy of cuss words during a live interview on Fox News Channel. Priestley — who was promoting his documentary on the rock group Barenaked Ladies — accused the media of printing lies about him "so they can sell f---ing papers." The New York Daily News quotes a Fox source as saying Priestley seemed out of sorts prior to the interview and there "was a conversation of whether to put him on the air." The actor's rep blamed his behavior on jet-lag.