To tickle someone behind the ear with a piece of sourdough bread whilst singing Waltzing Matilda
A got kugged by a homeless person on the side of the road last night.
The sweetest person to exist! Not only is he a caring oppa, but he's also the most attentive and loving husband. Mun Kug is very easy going and makes everyone around him feel comfortable. His smile is purer than puppies and his eyes curve like the crescent moon.
Friend A: Hey, did you see the endearing look her husband gave her?
Friend B: YES! It was so Mun Kug style affection.