I used to roll my eyes and say "Jeeeesus" all the time.

"What in the world?" a la Chris Tucker in Rush Hour 2, or "What in the world is going on up in here?"

"Cute."

When I go over a chess game from a student who blew an obvious win: "Snatching defeat from the jaws of victory."

"S@#t kid." Also a big fan of other profanities.

ScottieK