what do you fly your flag upside down for

Flying a flag upside down is generally a signal of dire distress or extreme danger, not just a casual protest. In U.S. practice, it comes from older military and maritime custom and is also recognized in the U.S. Flag Code as an emergency signal.

What it usually means

• A call for help in a serious emergency, especially when life or property is at risk.

• In modern use, some people also use it as a symbolic protest to express that they think a situation is badly wrong or in crisis.

Why people do it

• Historically, it signaled that a fort, ship, or group was in trouble and needed immediate assistance.

• Today, the meaning can depend on context: some see it as a distress signal, others as political expression.

Important note

• For the U.S. flag, it is meant to be reserved for genuine distress situations, not routine decoration.

TL;DR: an upside-down flag usually means “we’re in distress” ; sometimes people also use it to make a protest statement.