panic button

American  

noun

1. an alarm button for use in an emergency, as to summon help.

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idioms

1. push / hit / press the panic button,  to give way to panic in a distressing situation.

panic button British  

noun

1. a button or switch that operates any of various safety devices, for use in an emergency

2. informal  to react to a situation by demanding emergency action; become excited; panic

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Etymology

Origin of panic button

Allegedly first used in reference to emergency bell systems on World War II bombers such as the B-17 and B-24

Example Sentences

“It’s too early to be hitting the panic button yet,” says Daniel Kritenbrink, a partner at the consultancy The Asia Group and previously the assistant secretary of state for East Asian and Pacific Affairs.

From Barron's

"There is, therefore, absolutely no need to press the 'panic button' today to alarm the nation and the international community."

From BBC

When facts are seditious, it’s time to hit the panic button.

From Salon

Four losses in 19 matches - in a season which has included a title win in Rotterdam - does not suggest the panic button should be pressed yet.

From BBC

The water alarm was triggered at 8:16 a.m., and the panic button on the keypad by the front door was activated at 8:55 a.m.

From Los Angeles Times