To make a mistake or fail to do something important.

1. I really dropped the ball during the sales meeting—I brought the wrong files.
2. Don’t drop the ball this time. We’re counting on you.

A way to say that sometimes things go well, and sometimes they don’t. It’s a part of life.

1. The presentation didn’t go well, but you win some, you lose some.
2. I didn’t get the job, but hey, you win some, you lose some.

To mentally prepare and focus for a serious task, like a presentation or challenge.

1. The presentation starts in five minutes. Time to get my game face on.
2. He put his game face on before the big interview.

To do something extremely well, like giving a great performance. From baseball.

1. I’m sure you’ll hit it out of the park during your speech.
2. Her cooking was amazing—she hit it out of the park.

To not be performing at your usual skill level.

1. I feel off my game today—I can't focus.
2. If I’m off my game, help me out during the meeting.

To be nearby or watching, but not actively involved unless needed. Comes from sports.

1. I’ll be on the sidelines if you need help.
2. He stayed on the sidelines during the discussion but stepped in when needed.

To improve your performance or effort in order to succeed or compete better.

1. I’m trying to up my game for this date.
2. She upped her game to get the promotion.

Someone is "out of your league" if they seem much better or more attractive than you.

1. I hope it goes well. She’s kind of out of my league.
2. He’s a great guy, but he thinks I’m out of his league.

To get someone to like or support you through charm or effort.

1. I’m sure you’ll win her over—just be yourself.
2. He won the team over with his positive attitude.

To stop doing something before a mistake happens, especially after success.

1. You made a great first impression—quit while you're ahead!
2. I’ll quit while I’m ahead before I say something embarrassing.