and the Pig goes....

Last Christmas when my parents, K, my sister H soon to be Emo, and I were in Seoul, we checked out the Year of the Pig exhibit at the National Folk Museum. Swine galore, from fierce looking bronze boars in armor to colorful arrangements of plastic pigs. The most entertaining by far was the list of pig noises by language, e.g. English "oink-oink." In Korean it's "kkool-kkool" and in Chinese it's "hung-hung".... wait a minute, hung-hung? What the heck is that? When does the pig go "hung-hung?" Please, my Chinese homies, explain this hung-hung business, is this for real?