1. A term frequently used by politicians when accused of something scandalous. It means: "I did it, but as long as there's no smoking gun I will deny it completely." Most such scandals involve illicit sex, bribery, influence peddling or misuse of public funds.
2. A worn-out public relations phrase that nobody believes anymore. Nixon's famous remark -- "I am not a crook" -- sounds positively Shakespearian in comparison.
"The accusation is categorically false!," said South Carolina Republican Nikki Haley. She is accused of having an "inappropriate physical relationship" with the governor's former press secretary.