Silentveev 

An adjective describing something that hasn’t been invented yet or is otherwise undiscovered.

Joe knew his idea for drivable toilet was Silentveev.

Silentveev by Nakefame March 8, 2023

Silentdeed 

The act of wanking without getting caught, also can be used in relation to other sexually related actions

I almost got caught doing a silentdeed yesterday

Silentdeed by D0bby December 28, 2007