(Jae-Jin covertly scribbling on the desk.)
Me: (busting his bubble) Jae-Jin! Your turn. Start reading from page 24.
Jae-Jin: (surprised) What the... (swatting away a fly)... bug!
(entire class erupts in laughter)
Jae-Jin: (proud of his impromptu witticism) Teacher... sound is like a bad say. Sound is like...
Me: Yes, thank you, Jae Jin.
(Enter our new expletive: "What the bug?")
Sometimes the kids just make my day.