That 70s Comic

Who says that the Caped Crusader is not down with the hip lingo the kids use these days?

Yes, Batman just said, "Far out"!

And...

Yes, Batman just said, "Right on!"

And then, old man Wildcat gets in on the game:

Let's face it--Bob Haney knew how to write to his era.

From Brave & The Bold #110 (1973)