flag out

verb
  1. (adverb) to register (a commercial vehicle) in a country other than the one in which it operates, usually in order to take advantage of favourable rates of taxation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012