substack 

an online platform that provides publishing, payment, and infrastructure that supports online subscription publications. It allows news reporters to send digital news stories to subscribers without being screened by agenda-driven editors.

Members of Congress questioning news reporters had no knowledge or understanding of the meaning of substack.

substack by Farid Attar March 23, 2023

Substack

The semi-visible layer of cultural production where people publish seriously but without institutional validation; the cultural production published seriously within a semi-visible expanse of recognition. Commonly used of literary publications but may apply to any published form of work.

"I just have to escape the substacks!" exclaimed Paul.
"You're sick of being stuck within the substack," mused Pauline.

Substack by theartcompany January 15, 2026

substache 

a temporary fake mustache one uses while waiting for his/hers to grow in thicker

"I started Movember fresh so I had to use a Mr. Potato head substache till I caught up"

substache by Mr Roboto234 November 2, 2011