I think this is what you want: scrub [skruhb] noun 1.low trees or shrubs collectively. 2.a large area covered with low trees and shrubs, as the Australian bush. 3.a domestic animal of mixed or inferior breeding; mongrel. 4.a small or insignificant person. 5.anything undersized or inferior. 6.Sports. a player not belonging to the varsity or regular team; a player who is not first-string. It's also used to identify a troll.