Rtbrjpnbphmphjssnocfmstesiskssvtartwfnhm

Rtbrjpnbphmphjssnocfmstesiskssvtartwfnhm is a 40-lettered word John made up in 2008.

Etymology
The intial letters of every SpongeBob SquarePants Season 1 episode title (except Help Wanted) put together