roughswitch
nounUK /ˈrʌfswɪtʃ/
US /ˈrʌfswɪtʃ/
A roughswitch is a bumpy switch that you flip to turn something on or off.
He pushed the roughswitch on the old lamp and the light came on.
OTHER MEANINGS
2. A switch with a textured surface that is easy to grip.
The roughswitch on the machine was made for gloved hands.
3. A sudden, harsh change in a plan or situation.
The weather did a roughswitch and turned stormy by noon.
4. A person who changes sides in a rough or abrupt way.
The coach called him a roughswitch after he joined the other team.