plow on

plough a lonely furrow

To carry out an action in isolation, or in an original way, without any help or support from others.

plough money

To invest money in a project or endeavor, especially to help it succeed or earn more money.

plough one's way

To make one's way.

plough the back forty

To engage in sexual intercourse.

plow one's way

Alternative spelling of plough one's way.

plow the sands

to spend considerable time and effort to do something useless; to waste time

plow with one's heifer

To have an affair with another man's wife or to deal with the wife in order to obtain something from her husband.