'fudge factor' definitions:

Definition of 'fudge factor'

From: WordNet
noun
A quantity that is added or subtracted in order to increase the accuracy of a scientific measure [syn: correction, fudge factor]

Definition of 'fudge factor'

From: GCIDE
  • fudge factor \fudge factor\, n. a term or factor inserted into a calculation to compensate for anticipated errors, or to arbitrarily make the result conform to some desired conclusion. [PJC]