scaryswitch

noun
UK /ˈskeəri swɪtʃ/
US /ˈskeri swɪtʃ/

A scary switch is a button that makes something spooky or frightening happen.

The haunted house had a scaryswitch that made ghost sounds play.


OTHER MEANINGS

2. A switch that turns on scary lights or sounds in a game.

Press the scaryswitch to make the monster appear on screen.

3. A change that makes a story or movie suddenly frightening.

The film's scaryswitch came when the music turned dark.

4. A playful name for a control that surprises someone.

He flipped the scaryswitch and everyone jumped.