What is the meaning of "them" in this sentence?

In Leon the Professional, Leon put a knife over a rich man's neck and the rich man said this to him.

Hey, relax, man. I got half of Bolivia sitting in them suitcases over here.

What's the meaning of "them" and can you give other examples using it?

This is just ungrammatical English. What he should have said is

Hey, relax, man. I got half of Bolivia sitting in those suitcases over here.

This misuse is frequently heard particularly in Cockney which is a dialect spoken in East London, traditionally by those born within earshot of Bow Bells (St Mary-le-Bow church). It is often associated with the working classes. The difference between them and those is answered over in ELL by this Q&A