Peppy La Peued? That's what I would say.....
The scent Peppy La Peued behind him as he left the building.
Is there a word for the trail of a scent?
Couldn't find anything besides this:
Sillage (pronounced as see-yazh) is a term used to describe a scented trail left by the fragrance wearer.
http://boisdejasmin.com/2011/02/perfume-vocabulary-fragrance-terms-sillage.html
Stink. Stench. Funk. Green fog. Blast radius. Contamination zone. Being cropdusted. Dreadcrumbs.