Besides physically spilling something, it's also used to mean "spilling the tea," which refers to secrets or gossip. It can build excitement when you say, "Have you heard the big news?"

In English-speaking cultures, there's a custom called "Pour one out," where a little alcohol is poured on the ground to honor someone who has passed away. This emoji can be used to signify that kind of tribute. Its use is also expanding to abstract meanings, like pouring out emotions or tears.