PDN = Proctologically Derived Number. An obscure mathematical classification for almost all numbers, including dollar amounts, presented to the public by governmental entities, politicians, pork-barrel government contractors, and other self-righteous prevaricators, with the sincere claim that the number is totally based on sound science, fiscal integrity, and the public's best interest. PDNs are typically presented as having at least an order of magnitude higher accuracy and reliability than the more commonly used WAG (Wild Ass Guess) classification of numbers. A sub-classification of PDNs is the LBSPDN (Loose Bowel Syndrome PDN), typified by numbers presented in such a manner or quantity as to inundate the public, leaving them flush with bewilderment.
The proposed Federal budget presented by the Bush Administration to the Congress, and the American people, is a fathomless melange of obfuscated PDNs.
RDN was voiced by Bill Maher on Real Time (5/21/10). Synonymous with PDN (see PDN - Proctologically Derived Number; previously posted to Urban Dictionary); numbers, statistics, budgets, etc. derived from and consisting solely of voluminous fecal accumulation, frequently embellished with politics.
The Catholic Church's tally of child sexual abuse cases committed by its clergy is a constipated RDN (Rectally Derived Statistics).