There's lots of business books that say we should learn from the wisdom of children, and I completely agree. During meetings, you may find the following two phrases useful.
"Not it!" This is good for shirking responsibility. Sample usage:
Big Boss: "We need to see a report summarizing this quarter's trends in the follow geographic regions..."
You: "Not it!"
"Shotgun!" Similarly, you may wish to express strong agreement with a sentiment, or that you're willing to go along with a suggestion that's been made. You're along for the ride.
HR Director: "We are strongly advocating that casual Fridays be extended to accommodate employees who elect to go pantsless."