Exit Strategy:

When the meeting starts to drag on, just pretend you have a "meeting" with a "very important client" in another room.

Re-Entry:

When you do finally get out of the meeting, re-enter with a "fresh perspective" and a "new idea"

Feigned:

This is just a placeholder for when you have no idea what you're doing

FAQ:

Q: Why do I have to go to this meeting?

A: Because someone in charge said so.

Q: Can I just leave?

A: Only if you want to get a good seat in the next meeting.