protest flag

American  

noun

1. a flag hoisted by a racing yacht to advise the judges of a violation of the rules by another yacht.

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Example Sentences

The boat was later seen flying a protest flag but the crew has not provided detail of the incident.

From Seattle Times

The boat was later seen flying a protest flag.

From Seattle Times

Last summer, Herbert Chow, who owns Chickeeduck, a children’s clothing chain, installed a seven-foot figurine of a protester — a woman wearing a gas mask and thrusting a protest flag — and other protest art in his stores.

From New York Times

Protesters from BLM 757, a Black Lives Matter group from Virginia Beach, were on hand with a bullhorn and a large protest flag.

From Washington Post

It ends in a challenge to Beijing, with a black-clad protester running the Chinese flag down a flagpole and running up a protest flag.

From Los Angeles Times