Slicing Bread

The act of cutting yourself.

Yuri is slicing bread again.
Damn. I hope she can get the help she needs.

most exciting thing since sliced bread

This expression is used when a person does or tells you something you already know and thinks it is absolutely amazing.

Person 1: She got a hollywood wax for the first time.

Person 2: let me guess its the most exciting thing since sliced bread for her.