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.