(Especially in the context of old-school mobsters) Hiring someone for their services and killing them once they are no longer needed.
Richard Turner says never take an gig from a powerful oil magnate, you'll be 100% used!
A vile and blatant copy of Urban Dictionary, more often than not (if not always) copy/pasting definitions of urban words from here.
Person: what is a controller jock?
Other Person: IDK, I'll just look it up on definithing.
Person: Why do I still hang out with you?