What is go MIA?

It means like you are going to go crazy. You can hear MIA in song by Lil Xan - Slingshot but he speels it M I A.

Lil Xan - Slingshot lyric:
I might go MIA.

go MIA - video

Go MIA - what is it?

Go missing in action.

I am gonna go MIA for a while.