Scrub
/skɹʌb/
noun
One who labors hard and lives meanly; a mean fellow.
One who is incompetent or unable to complete easy tasks.
“What a scrub! Instead of washing the dishes she put the used food on her face!”
A thicket or jungle, often specified by the name of the prevailing plant
“oak scrub”
adjective
Mean; dirty; contemptible; scrubby.