What is the meaning of the phrase "a good for nothing fellow"?

lazy or irresponsible

The answer is (1) lazy or irresponsible.

The other options are incorrect.

• (2) proven ineffective does not fit the meaning of the phrase. A good for nothing fellow is a general term, while proven ineffective is a more specific term that describes someone who has been shown to be incompetent.
• (3) fail to keep level does not fit the meaning of the phrase. A good for nothing fellow is a derogatory term, while fail to keep level is a neutral term.
• (4) foolish is similar to lazy or irresponsible, but it has a more specific meaning. Foolish describes someone who is not wise or who makes bad decisions, while a good for nothing fellow is someone who is not productive or who does not contribute to society in a meaningful way.