Dry bread 

the old bread that becomes strong and unfit to eat

Ew, I don't wanna eat that dry bread!

Dry bread by Galinial December 1, 2020

dry bread 

A boring rule following person

She is such a dry bread

dry bread by [e-mail] September 29, 2013

As dry as bread 

An expression used to express speechlessness when someone says something extremely nasty and brutal for no apparent reason

-I hate Lilly she's a hoe and no one should like her.
-Oh! That was as dry as bread!

As dry as bread by the little robert June 2, 2015