cranial-rectal inversion
n.— «I learned that Officer Sam Morgan, of the California Highway Patrol, occasionally uses the term “cranial-rectal inversion” when referring to drivers of especially poor judgment, which was one of the most satisfactory things I learned all summer, come to think of it.» —“The Urge to Merge” by Cynthia Gorney New York Times Magazine Aug. 3, 2008. (source: Double-Tongued Dictionary)