Paab

Paab was a measurement of length defined by the Emperor Jate as the distance from his nose to his fingertip. In a question ("Which measurement of length is said to have been defined by the Emperor Jate as the distance from his nose to his fingertip?") on the Game Station's version of The Weakest Link, Rodrick incorrectly said that the measurement was Goffle. (TV: Bad Wolf)

Behind the scenes
This question is a reference to the legend that the English yard was defined as the distance between the nose to the fingertip of King Henry I.