他把大姨妈当果汁喝了
[tā bă dà yí mā dāng guŏ zhī hē le]
This nickname uses a humorous and rather shocking imagery to refer to someone treating a difficult situation (often euphemized as 'Aunt Flow' in Chinese, referring to menstruation) lightly or inappropriately. It reflects sarcasm and may be used for self-deprecating humor or to express confusion and absurdity.