Weekend Lesson No. 8 : Let's learn some informal expressions. 1. I'm done (finish) : I'm done with my homework. (give up) : I'm done arguing with you. 2. I'm lost (can't find a way) : I'm lost in this city. (confused) : I'm lost in this conversation. 3. I'm in charge (leader) : I'm in charge of the team. (responsible) : I'm in charge of closing the shop tonight. 4. I'm off (leaving) : I'm off to work now. (not working today) : I'm off on Fridays. 5. I'm up (awake) : I'm up early today. (my turn) : I’m up next in the game. 6. I'm down (ready) : I'm down for a movie tonight. (okay with it) : I'm down with your plan.