明天来uc上班
ming tian lai uc shang ban
This phrase directly translates to: "Tomorrow, come to UC for work"
The context necessary for one to understand this phrase is that UC is a company that produces exaggerated headlines such as:
"震惊！看完令人沉默！惊呆所有人！等等" (which translates to "shocking! those who have seen these are speechless! everyone is shell-shocked! etc)
Therefore, whenever someone says something extremely exaggerating, people will reply with "report to UC for work tomorrow", which hints at their exaggeration. This is also a subtle way of letting people know that they have caught onto your exaggerated words or story and is asking you to tone down.