2) To be confused or confusing, mislead or misleading, to just be completely wrong.
3) when you can't believe what the person is saying, like you must kidding me, or are you serious?
girl: I cant come to the party
friend: girl you bee greegin', you so can
girl: Omg like i was totally wearing this pink dress and then like....
friend: girl you bee greggin'
friend: wait what? you bee greggin'