slip out

verb4

1. •
   To leave quietly and unnoticed.
2. •
   To be said or revealed by accident.

   • I was talking to Jim, about Paul and Ethel, when it just slipped out about their possible divorce. I’m sorry.
3. •
   (informal) To go out for a brief moment; to pop out.
4. •
   Of an object: to work loose and slide out of proper position.