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!
Bottled water is NOT susty.
I'm telling you, it's susty to shower with your buddy!
Hey, your driving onefucking block to pick up smokes just ain't susty.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.