The authoritative instrument for the distribution of all forms of official IRS tax guidance is the Internal Revenue Bulletin (IRB), a weekly collection of these and other items of general interest to the tax professional community.
perfidy definition: The definition of a perfidy is a deliberate betrayal. (noun) An example of a perfidy is spreading a best friend's secrets all over town....
perkÂ·y. adj. perkÂ·iÂ·er, perkÂ·iÂ·est. 1. Buoyant and self-confident; briskly cheerful. 2. Jaunty and appealing; sprightly: a perky tune.