Unwrittable 

adjective: not possible to be written on; typical of a surface on which is impossible to write or that doesn't allow to write down anything.

How can you write there L.? It's an unwrittable paper that one you're trying to use!

Unwrittable by StesiL March 6, 2022

unshittable 

Adjective.
Unable to be made shitty by any means.
Untouchable.

<i>The local hangout spot seemed to be unshittable, that is until some of the local kids shittified it..

unshittable by Leanne and Rob March 23, 2008