Ross: Let me ask you something, at your school was there a like uh a place on campus where students went to uh, fool around.
Rachel: Yeah, there was. It was-there the corner of the library where-where all these dusty books that nobody ever read-Yes, there was.
Ross: Great! Because people kept showing up, I think it’s like uh-a thing!
Joey: Now hold on a second, fifth floor against that back wall?
Ross: Oh for cryin’ out loud! (He storms out.)
Is "Oh for cryin' out loud!" as same as "Oh for God's sake!"??
It means, For Christ's sake and it's called a minced oath. Check out this site: http://www.phrases.org.uk/meanings/minced-oath.html