12 letters · 16 points in Scrabble
origin19th-century American English. Possibly from snallygaster, a mythical beast that preys on poultry and children; possibly from Pennsylvania German schnelle geeschter, from German schnell (“quick”) + Geist (“spirit”). Largely obsolete, it briefly resurfaced in 2009 in Britain as part of a debate over MPs' expenses.
Etymology from Wiktionary, CC BY-SA 3.0