White Sliced piece of bread

A person who is bland, plain, or devoid of any character whatsoever.

John’s cousin is like a white sliced piece of bread; he’s fucking boring.

Slicing Bread

The act of cutting yourself.

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

Finely Sliced French Bread

Another word for vagina

"Give me a piece of that finely sliced French bread"

filthy slice of rye bread

a term coined by yours truly, refering to a traitor or similar (in reference to a disease you used to be able to get from eating rye bread called ergotism)

(in a game of among us)
Blue: WHY! FINE BROWN IS THE OTHER IMPOSTOR
Brown: You filthy slice of rye bread

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.