To be strong and resistant; be sturdily stoic; persist; tough it out: Cook claimed that he was innocent of any wrongdoing and until last week insisted that he would ''gut it out''(1970s+)
Idioms and Phrases with gut it out
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.