(idiomatic) Unconventional or unrestrained behavior; extreme, nonconformist views; the side of one's personality which harbors a tendency toward such behavior or such views.

A flag with a white color, used as a symbol of truce or surrender. / (motorsports) A flag with a white color, signifying the final lap of a race (ie. the bell lap).

A flag with a black color, used as a symbol of anarchism. / A racing flag with a black color, used in auto racing to summon a driver to the pits.

(transitive) To summon (a racing driver) to the pits by waving a black flag.

A person carrying a standard or flag, usually at sporting events and parades, previously on the battlefield.

(literally) To display the flag of one's country, especially as an expression of patriotic pride.

plural of flag officer

(games) A game normally played by children, or as part of paintball, in which two teams have a flag which is stored at the other team's base. Whichever team returns their flag to their own base first is the winner.

(transitive, US, idiomatic) To claim as deserving support for patriotic reasons.

The flag of Great Britain or the United Kingdom. / (nautical, Britain) The flag flown on ships of the government of Great Britain or the United Kingdom.