A New Orleans expression meaning good friend. Someone who you have gone through some things with "round" pronounced roun indicates the person has been around in your life for sometime and you have forged a bond with.
A raunchgoob is a person who gets excited by raunch. A raunchgoob will giggle like a school girl and generally act silly when thinking, talking, reading, or hearing about kinky, dirty acts and situations.
Mark: What are Preston and Gary laughing about?
Gene: They just saw that commercial for a new day spa, and it's called "Golden Showers"...
Mark: Those guys are such raunchgoobs!