I have a room full of kindergartners who say that all the time. I've found myself saying it around the house, now!!!
Last year, around faculty and in faculty meetings only (never in the classroom) I would say "that's hot ", which is a Paris Hilton-ism ... just to see if anyone would catch it as I work w/a lot of ready-to-retire teachers and only 2 who are younger than 40. Can you believe it took til the last day of school for someone to notice!?!?!? Hahahaha!