Sillage aka The Ephemeral
Sillage (n.) - a term used by perfume aficionados to mean the trail of scent you leave wafting behind you
example, courtesy Urban Dictionary user Parfumes4me: Meg2005 might announce:- Wearing Miss Balmain today and the sillage billowing from my capacious ass is a glorious bouquet of gefilte fish, stilton cheese and a dead mouse.
thx, twitter/finnb