To work hard, especially physical work.
Swink can make people think of old-fashioned hard work, like farming or building things by hand.
Examples:
She swinks in the fields all day.
We swinked to build the house.
The workers swink hard to finish the road.
I swinked so much that I'm very tired now.
Back in the old days, people swinked from sunrise to sunset.
He swinks every day to make a living.