The idiom to 'make a splash' means to make a big impact or to become suddenly successful or famous. This is a casual expression used in social and professional contexts.

1. Tom moved to Hollywood to achieve his goal of becoming an actor. He's making quite a splash, I hear.
2. Her new book made quite a splash on the book charts, reaching number one after just one week.

1. We made a big splash with our publicity stunt. It's in all the papers!
2. The company had to go back to the drawing board after their latest product failed to make any kind of splash in the market.