Google turns up some twitter/tumblr spec that it's based on the Russian word for "quiet" because he talks so much and maybe he was getting told that a lot.
But these don't sound all that much like "Tishy" to me: https://www.youtube.com/watch?v=5v20E9gAu7U
Re: Fic Discussion - Camouflage by Snickfic
From: (Anonymous)But these don't sound all that much like "Tishy" to me:
https://www.youtube.com/watch?v=5v20E9gAu7U
*shrug*