flag out

Related to flag out: flag up

flag out

vb
(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
References in periodicals archive ?
Carl added: "We've always wanted to have a big flag out there with people waving their other flags as well - very similar to the Liverpool Kop atmosphere and what it brings for the game...