what is a scrub, when you call someone one?

I know that a scrub is a nurses outfit, but on facebook when you answer questions about people it says “do you think “bob” is a scrub?” what does that mean?

Best answer:

Answer by mrsyco
A scrub is a guy that thinks he’s fly and is
also known as a buster
always talkin’ about what he wants
and just sits on his broke ass