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.