Le Mot Juste

In a class of year sevens - 11 and 12 year olds. Ten minutes into the lesson, a gaggle of four boys turn up late, and sheepishly shamble in to the room. At which point, the smart girl at the front of the class who always has her hand up gazes at them scornfully with all the (considerable) poised eleven-year-old sophistication she can muster, and murmurs ironically: 'Oh, Bon Voyage!'