the shit has hit the fan

1) Wild chaos and drama just started going down.

2) A famous lyric from Warren Zevon's 1978 hit "Lawyers, Guns, And Money", singing it in reference to him getting found while on the run right after he realized he tried to bed a woman he didn't know was a Russian spy until it was too late:

And I'm hiding in Honduras/I'm a desperate man/Send lawyers, guns, and money/The shit has hit the fan