Partly True

To waste effort on something already settled, finished, or hopeless; to keep pressing an argument or cause that can no longer go anywhere.

To take on more than you can handle: a task, commitment, or responsibility bigger than your time, ability, or resources can manage.

A costly possession that is more of a burden than a benefit — something expensive to keep, hard to get rid of, and of little practical use.

Feeling ill, unwell, or slightly out of sorts.

A hopeless or absurd pursuit of something that cannot be caught or found.

Said of an effort or guess that falls just short of success; near enough to deserve recognition, but not good enough to win the prize or be counted correct.

To reach the required standard; to perform well enough to succeed, meet expectations, or prove oneself capable (most often heard in the negative, "can't cut the mustard").

To turn a blind eye is to deliberately ignore something you know to be wrong, pretending not to notice it.

The very last moment of a difficult or unpleasant process, reached by continuing stubbornly until nothing whatever remains to be done.

To force yourself to endure a painful or unpleasant situation with courage, accepting it because it can no longer be avoided.