He left public service after voters 'booted' him from the mayor's office. [=he chose not to work for the government after he was not reelected as mayor]
I heard they 'gave her the boot'. [=they fired her; they told her she could no longer work for them]
You don't need all these applications to open every time you 'boot' your computer.
(..) There were guerrillas. They took the two men from the helicopter, but there's something else. - What do you mean? - Six men wearing US-issued army boots. They came in from the north, and then they followed the guerrillas. Mean anything to you? Probably just another rebel patrol. (..)1987 Predator