fall to
fall to {v.}
1. To begin to work.
The boys fell to and quickly cut the grass.
Syn.: TURN TO.
2. To begin to fight.
They took out their swords and fell to.
3. To begin to eat.
The hungry boys fell to before everyone sat down.
4. Begin; start.
The old friends met and fell to talking about their school days.
Categories:
Source: A Dictionary of American Idioms