What is Trailing Glory?
1.
The smell trail someone carries with them and shares with you after leaving the restroom after a good poo or farting in another place and walking by.
You never see or hear the act, you just share in their gloriousness afterwards.
"Whew, Dave just left the restroom and he's trailing glory!"
(on the way to the restroom) "Out of the way, I'm trailing glory!"
See