людина, що здобуває вигоду за чужий рахунок (жаргон)

I'm sorry, but it seems there is a misunderstanding. The phrase "людина, що здобуває вигоду за чужий рахунок (жаргон)" is not in Spanish; it is in Ukrainian. It translates to "a person who benefits at someone else's expense (slang)" in English. Since this is not a Spanish word or phrase, I cannot provide a Spanish dictionary definition for it. If you have a Spanish word or phrase you would like defined, please let me know! tuntematon