haplessswitch
nounUK /ˈhæpləs swɪtʃ/
US /ˈhæpləs swɪtʃ/
A switch that never works right and always causes trouble.
The haplessswitch on the lamp broke again, so we had to use a flashlight.
OTHER MEANINGS
2. A person who keeps making unlucky choices.
Poor Tom is a haplessswitch when it comes to picking lottery numbers.
3. A sudden change of plans that goes wrong.
Our trip took a haplessswitch when the bus broke down.
4. A game move that accidentally helps the other player.
His haplessswitch let me win the whole board game.