lastswitch
nounUK /ˈlɑːst.swɪtʃ/
US /ˈlæst.swɪtʃ/
The last switch is the final button you press to turn something on or off.
Before bed, Dad flipped the lastswitch to turn off all the lights.
OTHER MEANINGS
2. The final change made in a series of changes.
The lastswitch in the plan moved the meeting to Friday.
3. The last turn or change of direction on a route.
Take the lastswitch before the bridge to reach the park.
4. In games, the final move that changes the outcome.
Her lastswitch won the match for the team.