bottom-feeder(- Do you know either of the assailants? – No. Why would we? – Well, they're former navy petty officers, dishonorably discharged. They're just a couple bottom-feeders probably looking to make a quick score off a person of noteTaras)
small-fry(The designation essentially severs the institution from the global banking system, but it is only a small-fry player. • A key suspect in the Bali bomb attacks told an Indonesian court on Thursday that he was only a "small-fry terrorist".4uzhoj)