Muncheon is an extra meal at any time during the day in addition to the more recognised; breakfast, lunch(eon),
tea and dinner. Similarly to luncheon, muncheon is a formal way of saying '
munch'. Traditionally, having a '
munch' is frowned upon and linked to greediness and lack of self control. Going for 'muncheon' is a politer way of describing your extra meal/snack.