What is "well-oiled machines"

Usage examples of "well-oiled machines".

The beasts moved like well-oiled machines, but they, too, bumped the fence and vanished like flash paper in a candle's flame.

Great universities like Harvard and Yale, like Princeton, once citadels of knowledge where truth might be pursued, had become well-oiled machines of death, instructing medical students that killing should be viewed as a form of healing, that only selected people who meet a series of criteria have a right to exist, that there is no right or wrong, that death is life.

Now the ptichka, their heads bobbing like well-oiled machines, swallow their arrogant, self-absorbed boyfriends.

All around him, men and women crept through the silent factory in teams, moving like well-oiled machines themselves.

The troops responded like the well-oiled machines their instructors had made them.

Their powerful muscles rippled along their backs, their hearts and lungs working like well-oiled machines.