An abbreviation of the word "sustainable" used to quickly tag any positive, environmentally-sustainable action, thought or deed (or to dis any stupid, NON-sustainable action thought or deed).
I see that you're now using a two-sided printer; very susty!
Combination of the words Sick, Wicked, and Nasty. Swasty is a term used when in the presence of something amazing. Used because saying 1 of the 3 words is just not enough to express its magnitude.
"DAMN, did u see that dunk?! That was swasty!"
"That movie was too swasty!"
"That was possiblythe most swasty thing I have ever seen."