"Leverage" is being used more and more often in a sense outside of the financial one. It means basically to use a strength to your advantage. For example, you want to leverage the collective knowledge of your team, which means really make use of their knowledge. Or leverage our position as a market leader, meaning that in some say, the fact that you have a good market position is going to help you in whatever project you're about to undertake. I have not yet (thankfully) heard it much outside of businesses or organizations. The days someone wants to "leverage your friendship" to borrow your truck, for example, is not yet here... for now.
"Tag" means to touch with your hand. The Family Fun site explains the game pretty well. It's played only by younger children.
And please don't use "u'r" - it's okay in a text message on your cell phone, but get in the practice of writing "you're" in every other context.