If a person has "" it means they have money. Its that swag slang for bucks, its been seen recently on twitter and heard throughout schools in america. You're not cool if you do not use it.
Malik : Im boutta buy this its only 10 Bunx!!
Chad : Dang, its 5 Bunx off!!!
or
Big Sean : Im stackin my bunx my wallet look like a bible
Tony : Bunx for daysssss