A slang term for a female that has low morals and standards, similar to a "skeezer". A knockaround has no shame and will do sinful things for spare change and is someone that has been with a tremendous number of guys. Generally any female associated with Tyler Moody.
Mafia / Mob slang for a "wannabe" - a guy who will do the organization's dirty work in hopes of moving up, but his superiors will never consider seriously regardless of his efforts
<Boss>This might be real dirty and I know you are on parole</Boss>
<Underboss>I'll get one of these my knockaround guys to handle it; they'll follow it like a carrot on a stick. It's practically done already, Boss.</Underboss>