Combination of the two words: Baby & Munch = Babunch. To act as a Babunch is to be both a baby and munch. Living a Babunch lifestyle means to be cute and baby like.
used to describe the appearance of a vagina as being similar to the appearance of a side-view of a roast beef sandwhich. The comparison is based on the fleshy, multi-layered folds existing in both roast beefsandwiches and vaginas.
"Look at your sandwich, it has total bununch!"
"Yeah, looks just like your mom's bununch last night!"