gut it out
To persist through a difficult situation. I'm amazed you gutted it out and went to school with such a high fever.
gut it out
Also, tough it out. Show pluck and perseverance in the face of opposition or adversity. For example, I know it's hard but we'll just have to gut it out, or His boss has a terrible temper, but Joe is determined to tough it out. The first term dates from the mid-1900s; the variant was first recorded in 1860.
gut it out
Slang To show pluck and perseverance in the face of opposition or adversity.