The other is Here, here! used to signify agreement. This is awfully common but I looked it up to be sure that I was correct in believing it should be Hear! Hear!
I was. It derives from Hear him! Hear him! -- used in approval during a speech. Kinda like spontaneous Amen's during a sermon. What about you? Are there any annoying bits of ill-used language that make you grit your teeth or reach for a red pencil?