拿着大姨妈去献血
[ná zhe dà yí mā qù xiàn xuè]
The term '大姨妈' is a euphemism for menstrual cycle. Translated loosely to English, this would be something inappropriate. But within certain online communities in China, it may indicate some humorous or exaggerated expressions, implying a very sacrificial spirit or doing everything for someone/something despite being in a disadvantaged condition. This expression contains black humor in the background of Chinese netizens.