go MIA 

Go missing in action.

I am gonna go MIA for a while.

go MIA by Jemedare June 25, 2018

I might 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.

I might go MIA by LOSM1 March 18, 2018