A person who constantly intrudes on another's privacy and requests to borrow personal items with little chance of returning said item.
Originating from the stereotype of 1980s and 1990s sitcoms where a neighbor of another ethnicity would behave in such a manner.
"Brad was a real ethnic neighbor this morning. He came into my room and asked to borrow my contact solution and a belt. I'll probably never see them again. Asshole."