someone who is being "shady"
Wow, Purdiep sell's shady ass dutches to CJ therefore he is a shadster
by ticeticebaby August 02, 2006
1 more definition
A very sketchy person, someone who is up to something and won't tell you, do not trust this person
Wow... shannon's boyfriend is such a shadster.
by Bessy January 07, 2006