[H]e came to this country in the service of an English gentleman, whom he was obliged to quit through the malice of the valet de chambre, who taking advantage of the young man's being overtaken with liquor on the last St.Andrew's day, turned him off, on the pretext of his being an habitual drunkard.
Source: wiktionary
Turn off the machine and unplug it when you leave.
Source: wiktionary
"Will it ever stop?" Yo, I don't know / Turn off the lights, and I'll glow
Source: wiktionary
Hello, IT. Have you tried turning it off and turning it on again? Ok. Well, are you sure that it's plugged in?