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.